Search a number
brilliant n.  and  centered triangular n.

First numbers that belong to both sets:

4, 10, 361, 901, 1219, 1891, 6241, 15151, 22879, 59701, 86041, 92629, 97921, 101791, 113851, 121411, 127459, 134551, 138169, 185329, 189571, 203689, 207019, 216031, 344881, 489919, 1110691, 1323991, 1722169, 1826569, 2190709, 2776441, 2858671, 2925319, 3212749, 3270079, 3463321, 3573589, 3596779, 3648061, 4076329, 4091179, 4135891, 4378459, 4771309, 4862701, 4965871, 5208949, 5412151, 5532481, 5759461, 5782999, 6214891, 6687649, 6738421, 6795769, 6969271, 7422601, 7637689, 8414689, 8464501, 8500171, 9348769, 9371251, 9612739, 9795871, 9857299, 10019461, 10104931, 10112719, 10143901, 10167319, 10229899, 10681339, 10777621, 10971481, 11463691, 11555101, 12342439, 12515149, 12654181, 12829051, 12864169, 13217989, 13289329, 13639861, 13866961, 13967479, 14568859, 14681269, 15011599, 15326419, 15355201, 15470599, 16093351, 16250959, 17334901, 18202159, 18327781, 19477819, 19836199, 20319121, 20930941, 21245899, 22389949, 23008459, 23291311, 24488461, 24731491, 25024711, 25914739, 26002099, 26152201, 26265061, 28783171, 29086219, 31526461, 34509619, 35480449, 36361279, 36672121, 37567531, 41257171, 41825521, 44121529, 45432769, 46312039, 49275139, 50660299, 53076979, 54713341, 56099011, 59923081, 60894019, 62684641, 65171809, 69942619, 80802391, 121729609, 134109721, 135389251, 135959881, 143018191, 150015001, 159243169, 161476501, 173166421, 173553439, 179017051, 185765269, 191246959, 191653669, 193421071, 201161971, 203216941, 205738849, 209870119, 212004649, 219052711, 223424731, 226768981, 237403471, 245318599, 248204449, 251612029, 253168609, 256021741, 258339379, 262489819, 264079639, 264995959, 271939141, 281719981, 284687929, 287505271, 300270079, 302481301, 305171149, 309292861, 310370761, 311018401, 311061601, 312272419, 320989519, 323980669, 328715419, 336578131, 346582801, 350057179, 351112051, 352950391, 353502829, 354978109, 355578319, 359608159, 360770359, 366140629, 367125571, 367313329, 372353671, 373725661, 380336779, 383256361, 398119459, 402235501, 406372711, 414112261, 419914639, 424192009, 427578859, 439615921, 441260929, 443940619, 444198709, 444766771, 445800541, 448130911, 452080441, 452914129, 453070531, 453122671, 461240641, 468847081, 472513879, 481931551, 482577049, 485973001, 487053571, 491442151, 500990851, 504725989, 505661941, 510244039, 513347251, 514235611, 515847721, 520978699, 521370139, 523217479, 529511599, 534426751, 550687141, 551319619, 561256489, 566374789, 566841241, 569001079, 570638281, 572219239, 574800301, 575093971, 579979849, 581219311, 582164551, 582637459, 584294149, 586190389, 587139661, 593746381, 597632341, 608459611, 614516761, 614698939, 615974941, 617130559, 624515431, 626414491, 628132249, 638055001, 639293071, 648679231, 649178419, 657756811, 658762339, 661720519, 666328279, 667846651, 682549339, 686715319, 686907901.

Some larger examples :