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 A140738 #5 Jul 10 2021 16:23:45 %S A140738 6,20,30,31,43,44,58,61,73,74,95,110,111,115,139,144,163,171,184,194, %T A140738 204,208,215,225,241,275,279,284,298,306,318,328,341,344,346,368,380, %U A140738 381,393,415,421,446 %N A140738 a(n) = (A139640(n) - 7)/24. %Y A140738 Cf. A139640. %K A140738 nonn %O A140738 1,1 %A A140738 _Artur Jasinski_, May 26 2008