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 A031046 #9 Jan 20 2024 18:22:12 %S A031046 0,8,24,40,56,72,88,104,120,121,124,127,130,133,136,139,142,144,168, %T A031046 192,216,240,264,288,312,313,316,319,322,325,328,331,334,336,360,384, %U A031046 408,432,456,480,504,505,508,511,514,517,520,523 %N A031046 Position of n-th 0 in A031045. %Y A031046 Cf. A031045. %K A031046 nonn %O A031046 1,2 %A A031046 _Clark Kimberling_ %E A031046 Missing a(1)=0 inserted by _Sean A. Irvine_, Apr 10 2020