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 A112303 #7 Mar 30 2012 18:40:02 %S A112303 2,7,3,17,11,5,29,19,13,41,31,23,53,43,37,67,59,47,79,71,61,97,83,73, %T A112303 107,101,89,127,109,103,139,139,131,113,157,149,137,173,163,151,191, %U A112303 179,167,193,181,227,211,197,239,229,223,257,263,251 %N A112303 Permutation of primes generated by 3-rowed array shown below. %C A112303 2 7 17 29 41 53 67 79...(A031377) %C A112303 3 11 19 31 43 59 71 83...(A031369) %C A112303 5 13 23 37 47 61 73 89...(A031336) %F A112303 a(n) = A000040(a(p+3q) = a(p)+3q) with p and q positive integers. %F A112303 a(n) = PrimePi(a(p+3q) = a(p)+3q) with p and q positive integers. %Y A112303 Cf. A115302. %K A112303 easy,nonn %O A112303 1,1 %A A112303 _Giovanni Teofilatto_, Oct 17 2006, Nov 08 2006