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 A342461 #13 Apr 09 2021 09:21:23 %S A342461 1,1,1,1,1,1,2,2,1,1,1,1,2,2,2,2,1,1,1,1,2,2,2,2,3,2,3,2,3,2,3,2,1,1, %T A342461 1,1,2,2,2,2,2,2,3,2,3,2,3,2,3,3,3,3,3,3,3,3,4,4,4,2,5,4,3,2,1,1,1,1, %U A342461 2,1,2,1,2,2,2,2,3,2,3,2,3,3,3,2,4,3,3,2,4,3,4,3,4,3,4,2,3,4,4,3,4,3,4,3,3,4 %N A342461 Number of nonzero digits when A329886(n) is written in primorial base, where A329886 is the primorial inflation of Doudna-tree. %H A342461 Antti Karttunen, <a href="/A342461/b342461.txt">Table of n, a(n) for n = 0..65537</a> %H A342461 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %H A342461 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a> %F A342461 a(n) = A001221(A342456(n)) = A001221(A342457(n)). %F A342461 a(n) = A267263(A329886(n)) = A329040(A005940(1+n)). %F A342461 a(n) <= A342462(n). %F A342461 For n >= 0, a(2^n) = 1. %o A342461 (PARI) A342461(n) = omega(A342456(n)); \\ Other code as in A342456. %Y A342461 Cf. A001221, A005940, A108951, A267263, A329886, A342456, A342457, A342462. %Y A342461 Cf. also A324341, A329040. %K A342461 nonn %O A342461 0,7 %A A342461 _Antti Karttunen_, Mar 15 2021