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 A031292 #11 Jul 13 2013 12:01:55 %S A031292 5,21,41,61,81,90,92,94,96,98,100,101,102,104,106,108,121,141,161,181, %T A031292 207,237,267,297,327,341,344,347,350,353,356,357,359,362,365,368,387, %U A031292 417,447,477,507,537,567,597,627,641,644,647 %N A031292 Position of n-th 5 in A007376. %C A031292 A007376(a(n)) = 5. %H A031292 Reinhard Zumkeller, <a href="/A031292/b031292.txt">Table of n, a(n) for n = 1..10000</a> %o A031292 (Haskell) %o A031292 import Data.List (elemIndices) %o A031292 a031292 n = a031292_list !! (n-1) %o A031292 a031292_list = map (+ 1) $ elemIndices 5 a007376_list %o A031292 -- _Reinhard Zumkeller_, Jul 28 2011 %Y A031292 Cf. A193428; A031287, A031288, A031289, A031290, A031291, A031293, A031294, A031295, A031296. %K A031292 nonn,less,base %O A031292 1,1 %A A031292 _Clark Kimberling_