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 A263652 #15 Dec 24 2021 08:12:28 %S A263652 1,3,5,10,12,17,20,24,30,35,41,44,47,52,56,59,63,66,72,81,84,89,92,98, %T A263652 101,105,110,116,121,125,129,134,138,142,148,152,156,162,168,173,179, %U A263652 183,187,196,199,202,208,212,215,225,228,232,236,242,246,251 %N A263652 Indices in A181391 (Van Eck's Sequence) where a new term first appears. %C A263652 Alternate name: Terms in A171862 in ascending order. %C A263652 The sequence includes seed value A181391(1)=1. %H A263652 Rémy Sigrist, <a href="/A263652/b263652.txt">Table of n, a(n) for n = 1..10000</a> %H A263652 Rémy Sigrist, <a href="/A263652/a263652.txt">C++ program for A263652</a> %F A263652 a(n) = A171865(n+1) - 1. - _Jan Ritsema van Eck_, Jul 24 2019 %o A263652 (C++) See Links section. %Y A263652 Cf. A171862, A171863, A171865, A181391. %K A263652 nonn %O A263652 1,2 %A A263652 _Bob Selcoe_, Oct 23 2015