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 A350615 #13 Apr 13 2023 23:26:57 %S A350615 1,8,12,20,742,513152128 %N A350615 Indices of 1's in A350877. %C A350615 This sequence is probably infinite, but may grow extremely rapidly. _Russ Cox_ has checked that there are no further terms below 4.9*10^12. - _N. J. A. Sloane_, Jan 25 2022 %e A350615 The 1 at 513152128 is a down-drop from 2^32 at index 513152096 in A350877, 2^32 being 712032365 at index 513152095 plus the prime 3582934931. %Y A350615 Cf. A350877, A350616. %Y A350615 See A362107, A362108 for the chains of powers of 2 that lead to these 1's. %K A350615 nonn,hard,more %O A350615 1,2 %A A350615 _Hans Havermann_, Jan 22 2022