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 A365433 #33 Oct 22 2023 16:57:38 %S A365433 1,2,2,4,3,6,4,8,5,9,6,12,7,12,10,16,9,18,10,20,13,18,12,24,13,21,16, %T A365433 28,15,30,16,32,19,27,21,36,19,30,22,40,21,42,22,42,40,36,24,48,25,39, %U A365433 28,49,27,54,36,56,31,45,30,60,31,48,36,64,41,66,34,63,37,56,36,72,37,57,61,70,50,77,40,80 %N A365433 Height of the ziggurat of order n described in A347186. %C A365433 The values of a(n) where a(n) = n give A174973. %C A365433 The values of a(n) where a(n) is not equal to n give A238524. %C A365433 If n is an odd prime then a(n) = (n + 1)/2. %C A365433 Since this is a supersequence of A174973 so all powers of 2 and all even perfect numbers are in the sequence. %C A365433 Shares infinitely many terms with A365195 from which first differs at a(15). %F A365433 a(2*n-1) >= n. %Y A365433 Row lengths of A365434. %Y A365433 Cf. A000079, A000396, A065091, A174973, A196020, A235791, A236104, A237270, A237271, A237591, A237593, A238524, A245092, A262626, A347186, A347263, A347367, A365195. %K A365433 nonn %O A365433 1,2 %A A365433 _Omar E. Pol_, Oct 18 2023