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 A238248 #4 Feb 20 2014 15:40:26 %S A238248 43,75,83,85,86,87,91,107,139,147,149,150,151,155,163,165,166,167,169, %T A238248 170,172,173,174,175,179,181,182,183,187,203,211,213,214,215,219,235, %U A238248 267,275,277,278,279,283,291,293,294,295,297,298,300,301,302,303,307 %N A238248 Numbers m such that A072219(m) = 7. %C A238248 a(n) = A043689(n) + 1. %H A238248 Reinhard Zumkeller, <a href="/A238248/b238248.txt">Table of n, a(n) for n = 1..10000</a> %o A238248 (Haskell) %o A238248 a238248 n = a238248_list !! (n-1) %o A238248 a238248_list = filter ((== 7) . a072219) [1..] %Y A238248 Cf. A000079, A238246, A238247. %K A238248 nonn %O A238248 1,1 %A A238248 _Reinhard Zumkeller_, Feb 20 2014