solutions of T^252 ...:
r: 3.68727421053600065662, r/4: 0.921818552634000164155; 4R: 6.22144268261188558244, R: 1.55536067065297139561
r: 3.71718673777363825306, r/4: 0.929296684443409563266; 4R: 6.38310376793294637052, R: 1.59577594198323659263
r: 3.76129765147122946217, r/4: 0.940324412867807365542; 4R: 6.62476472002052741515, R: 1.65619118000513185379
r: 3.78580451217611900133, r/4: 0.946451128044029750332; 4R: 6.76070678006082436113, R: 1.69017669501520609028
r: 3.85384955746760287051, r/4: 0.963462389366900717628; 4R: 7.14445729665803273894, R: 1.78611432416450818474
r: 3.87941916910233438762, r/4: 0.969854792275583596905; 4R: 7.29105475139397775574, R: 1.82276368784849443893
r: 3.89226158010513921822, r/4: 0.973065395026284804554; 4R: 7.36517704775227664280, R: 1.84129426193806916070
r: 3.91779753453544018173, r/4: 0.979449383633860045433; 4R: 7.51354245254109324001, R: 1.87838561313527331000
r: 3.92627928705038556772, r/4: 0.981569821762596391930; 4R: 7.56311046582011285537, R: 1.89077761645502821384
r: 3.93470226171174986045, r/4: 0.983675565427937465113; 4R: 7.61247736489605997097, R: 1.90311934122401499274
r: 3.94037200654290073155, r/4: 0.985093001635725182889; 4R: 7.64578753686112426249, R: 1.91144688421528106562
r: 3.94773624034831341085, r/4: 0.986934060087078352712; 4R: 7.68914894266280972819, R: 1.92228723566570243205
r: 3.95448526984732487711, r/4: 0.988621317461831219278; 4R: 7.72898320974482009668, R: 1.93224580243620502417
r: 3.96619354867518827119, r/4: 0.991548387168797067796; 4R: 7.79830416820230649181, R: 1.94957604205057662295
r: 3.97141427858391839331, r/4: 0.992853569645979598327; 4R: 7.82930281497238818647, R: 1.95732570374309704662
r: 3.97591995177548606900, r/4: 0.993979987943871517249; 4R: 7.85609955937541133051, R: 1.96402488984385283263
r: 3.97954329875314368033, r/4: 0.994885824688285920083; 4R: 7.87767826914476521489, R: 1.96941956728619130372
r: 3.98314007891073304360, r/4: 0.995785019727683260900; 4R: 7.89912473040353457027, R: 1.97478118260088364257
r: 3.98627377604147875627, r/4: 0.996568444010369689067; 4R: 7.91783106547303202021, R: 1.97945776636825800505
r: 3.98918752267288487860, r/4: 0.997296880668221219650; 4R: 7.93524204570325865017, R: 1.98381051142581466254
r: 3.99132381927298319994, r/4: 0.997830954818245799984; 4R: 7.94801819174990705739, R: 1.98700454793747676435
r: 3.99357745654426542177, r/4: 0.998394364136066355444; 4R: 7.96150598833003332971, R: 1.99037649708250833243
r: 3.99541672284708204821, r/4: 0.998854180711770512052; 4R: 7.97252134351195274893, R: 1.99313033587798818723
r: 3.99694450175928150044, r/4: 0.999236125439820375109; 4R: 7.98167634662518803647, R: 1.99541908665629700912
r: 3.99814813317876634134, r/4: 0.999537033294691585336; 4R: 7.98889222848332163412, R: 1.99722305712083040853
r: 3.99905758871220814406, r/4: 0.999764397178052036014; 4R: 7.99434642041228422184, R: 1.99858660510307105546
r: 3.99966094340511619272, r/4: 0.999915235851279048179; 4R: 7.99796577539007169051, R: 1.99949144384751792263
r: 3.99996234803846486160, r/4: 0.999990587009616215401; 4R: 7.99977408964845937707, R: 1.99994352241211484427