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 A178596 #6 Oct 19 2013 05:00:04
%S A178596 1,2,3,4,5,6,8,10,11,12,13,14,16,17,18,19,20,21,23,25,26,27,28,29
%N A178596 Records in A039996.
%e A178596 a(17)=20 because A178597(17)=749502, prime(749502)=11373379, and there are 20 primes embedded in 11373379: {3, 7, 11, 13, 17, 31, 71, 79, 97, 113, 131, 179, 317, 797, 971, 11317, 17971, 131797, 317971, 1317971}.
%Y A178596 Cf. A039996, A178597.
%K A178596 base,nonn
%O A178596 1,2
%A A178596 _Zak Seidov_, May 30 2010
%E A178596 a(18)-a(24) from _Donovan Johnson_, Jun 10 2010