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 A141792 #3 Mar 30 2012 18:52:27 %S A141792 2,3,5,7,11,11,11,11,11,13,17,19,19,19,23,23,23,23,23,29,29,29,31,31, %T A141792 31,37,37,37,37,37,41,43,47,47,47,47,47,47,47,47,47,47,47,53,53,53,53, %U A141792 53,53,53,53,53,59,59,59,61,61,61,61,61,61,61,61,61,67,67,67,67,67,71,71,71,71 %N A141792 Primes of the form A018252(n)-n, where A018252(n)=n-th nonprime. %e A141792 n=2: r(2)-2=4-2=2=a(1). %e A141792 n=3: r(3)-3=6-3=3=a(2). %e A141792 n=7: r(7)-7=12-7=5=a(3). %e A141792 n=11: r(11)-11=18-11=7=a(4). %e A141792 n=21: r(21)-21=32-21=11=a(5). %Y A141792 Cf. A000040, A051697, A018252. %K A141792 nonn %O A141792 1,1 %A A141792 _Juri-Stepan Gerasimov_, Sep 13 2008 %E A141792 Corrected and extended by _R. J. Mathar_, Sep 26 2008