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 A031332 #6 Feb 21 2025 15:19:30 %S A031332 23,24,30,34,44,53,54,61,67,86,111,121,124,129,133,149,152,189,204, %T A031332 205,211,222,236,242,247,252,254,255,256,258,284,306,312,314,317,340, %U A031332 342,361,365,370,386,396,399,409,414,421,423,441 %N A031332 Position of n-th 7 in A031324. %Y A031332 Cf. A031324. %K A031332 nonn %O A031332 1,1 %A A031332 _Clark Kimberling_