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 A076198 #4 Mar 30 2012 17:26:04 %S A076198 1,1,2,1,2,1,4,7,4,7,4,23,2,1,2,97,2,19,64,17,62,19,4,1,58,23,64,157, %T A076198 122,47,106,47,4,29,146,31,64,29,8,71,8,43,32,31,128,67,122,41,2,37, %U A076198 146,137,122,191,142,59,128,71,284,109,274,1,218,97,32,83,158,53,166 %N A076198 a(n)=least s>0 such that n!!-s is prime. %C A076198 Unlike the case n!!+s in A057019, there is no apparent rule for s here. %Y A076198 Cf. A057019. %K A076198 nonn %O A076198 3,3 %A A076198 _Zak Seidov_, Nov 02 2002