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 A030327 #18 Apr 13 2021 22:58:17 %S A030327 1,2,1,9,2,1,4,9,37,17,2,8,1,4,31,44,9,41,37,51,17,6,2,8,36,16,1,60,4, %T A030327 31,160,109,44,22,9,41,155,37,261,97,51,115,17,6,14,2,29,141,8,40,36, %U A030327 50,16,5,1,85,60,49,4,59,31,161,160,479,109,142,44 %N A030327 a(n) is the least k such that the base-2 representation of n begins at s(k) in A030324. %Y A030327 Cf. A030324. %K A030327 nonn %O A030327 1,2 %A A030327 _Clark Kimberling_ %E A030327 a(39) and a(64) corrected by _Sean A. Irvine_, Mar 30 2020