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 A238247 #4 Feb 20 2014 15:39:51 %S A238247 11,19,21,22,23,27,35,37,38,39,41,42,44,45,46,47,51,53,54,55,59,67,69, %T A238247 70,71,73,74,76,77,78,79,81,82,84,88,89,90,92,93,94,95,99,101,102,103, %U A238247 105,106,108,109,110,111,115,117,118,119,123,131,133,134,135 %N A238247 Numbers m such that A072219(m) = 5. %C A238247 a(n) = A043688(n) + 1. %H A238247 Reinhard Zumkeller, <a href="/A238247/b238247.txt">Table of n, a(n) for n = 1..10000</a> %o A238247 (Haskell) %o A238247 a238247 n = a238247_list !! (n-1) %o A238247 a238247_list = filter ((== 5) . a072219) [1..] %Y A238247 Cf. A000079, A238246, A238248. %K A238247 nonn %O A238247 1,1 %A A238247 _Reinhard Zumkeller_, Feb 20 2014