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 A256414 #6 Apr 05 2015 15:36:02 %S A256414 2,3,10,13,21,26,34,35,47,54,61,68,77,82,91,100,109,118,127,136,137, %T A256414 151,156,168,181,191,201,208,209,217,240,245,262,263,278,292,299,307, %U A256414 320,329,339,346,367,370,379,380,405,420,433,441,446,456,461,474,488 %N A256414 Indices of prime terms in A121217. %C A256414 A010051(A121217(a(n))) = 1; conjecture: sequence is strictly increasing. - _Reinhard Zumkeller_, Apr 05 2015 %H A256414 Reinhard Zumkeller, <a href="/A256414/b256414.txt">Table of n, a(n) for n = 1..10000</a> %o A256414 (Haskell) %o A256414 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A256414 a256414 = (+ 1) . fromJust . (`elemIndex` a121217_list) . a000040 %o A256414 -- _Reinhard Zumkeller_, Apr 05 2015 %Y A256414 Cf. A121217. %Y A256414 Cf. A010051. %K A256414 nonn %O A256414 1,1 %A A256414 _N. J. A. Sloane_, Apr 05 2015