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 A111981 #3 Mar 30 2012 17:29:49 %S A111981 4,7,10,19,22,34,40,49,52,55,64,82,97,112,115,139,154,157,175,190,199, %T A111981 220,229,232,244,250,307,322,337,370,379,385,412,427,430,439,442,454, %U A111981 469,484,505,544,547,607,640,649,652,712,715,724,742,745,775,784,790 %N A111981 Numbers n such that 2n-1 and 2n+3 are consecutive primes. %F A111981 a(n) = (A029708(n)-1)/2 = (A029710(n)+1)/2 = (A031505(n)-3)/2. %Y A111981 Essentially the same as A088762. %K A111981 nonn %O A111981 1,1 %A A111981 _Ray Chandler_, Aug 24 2005