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 A116628 #8 Feb 14 2023 08:52:13 %S A116628 1,2,3,4,7,11,26,42,109,166,373,772,1532,2930,6154,10933,24184,44069, %T A116628 105575,155528,374727,681122,1630332,3077586,6523332 %N A116628 Positions where A116624 is a power of 2. %C A116628 Conjecture: all the powers of 2 occur in A116624 (implying that none occur in A116625) and they occur in ascending order, in which case A116624(a(n)) = A000079(n-1). Checked up to n=16. %H A116628 Rémy Sigrist, <a href="/A116628/a116628.txt">C program</a> %o A116628 (C) See Links section. %Y A116628 Cf. A000079, A116624, A116625. %K A116628 nonn,more %O A116628 1,2 %A A116628 _Paul D. Hanna_ and _Antti Karttunen_, Feb 21 2006 %E A116628 a(17)-a(25) from _Rémy Sigrist_, Feb 14 2023