This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A326737 #6 Jul 27 2019 10:07:35 %S A326737 4,22,41,104,114,124,134,144,154,164,174,184,194,204,212,221,249,304, %T A326737 404,411,429,504,604,624,704,804,904,1022,1041,1122,1141,1222,1241, %U A326737 1322,1341,1422,1441,1522,1541,1622,1641,1722,1741,1822,1841,1922,1941,2022 %N A326737 Numbers which converge to 4 under repeated application of the powertrain map of A133500. %e A326737 249 -> 2^4*9 = 144 -> 1^4*4 = 4. %Y A326737 Cf. A133500, A133501, A135384, A135385, A309385, A326733, A326734, A326735, A326736, A326738, A326739, A326740, A326741, A326742. %K A326737 nonn,base,easy %O A326737 1,1 %A A326737 _Martin Renner_, Jul 22 2019