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 A141784 #3 Mar 30 2012 18:52:27 %S A141784 2,3,3,3,5,5,5,7,7,7,11,11,11,13,13,13,17,17,17,17,17,19,23,23,23,23, %T A141784 23,23,23,29,29,29,29,29,29,29,29,29,29,29,29,29,31,31,31,31,31,37,37, %U A141784 37,41,41,41,41,41,41,41,41,41,43,43,43,47,47,47,53,53,53,53,53,59,61,61,61,61 %N A141784 Primes of the form A141468(n)-n, where A141468(n)=n-th nonprime. %e A141784 n=4: k(4)-4=6-4=2=a(1). %e A141784 n=5: k(5)-5=8-5=3=a(2). %e A141784 n=6: k(6)-6=9-6=3=a(3). %e A141784 n=7: k(7)-7=10-7=3=a(4). %e A141784 n=9: k(9)-9=14-9=5=a(5). %Y A141784 Cf. A000040, A051697, A141468. %K A141784 nonn %O A141784 1,1 %A A141784 _Juri-Stepan Gerasimov_, Sep 13 2008 %E A141784 Extended by _R. J. Mathar_, Sep 26 2008