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 A355896 #15 Aug 29 2022 05:31:23 %S A355896 1,2,13,11,23,19,59,53,127,113,277,271,631,619,1409,1399,1823,3967, %T A355896 3947,8783,8779,18257,18253,25873 %N A355896 Multiples of 3 in A354790, divided by 3, in order of appearance. %C A355896 The multiples of 3 in A354790 appear at indices 3, 7, 17, 35, 71, 143, 287, 575, 1151, ... and conjecturally at indices 9*2^k-1 for all k >= 1. %Y A355896 Cf. A354790, A355895. %K A355896 nonn,more %O A355896 1,2 %A A355896 _N. J. A. Sloane_, Aug 27 2022 %E A355896 a(16)-a(24) from _Rémy Sigrist_, Aug 29 2022