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 A220519 #6 May 05 2013 23:50:19 %S A220519 3,2,5,7,17,11,13,23,37,19,47,29,31,61,79,101,83,67,53,41,43,59,97, %T A220519 103,167,197,71,73,139,193,223,257,227,199,173,149,127,107,89,113,137, %U A220519 163,191,229,151,109,251,359,401,293,131,283,397,439,443,263,233,179,157,281,317,577,487,367,331,181,353 %N A220519 Permutation of prime numbers in the order of sequential reading the antidiagonals of A220508. %Y A220519 Cf. A000040, A220508. %K A220519 nonn %O A220519 1,1 %A A220519 _Omar E. Pol_, Feb 09 2013 %E A220519 More terms from _R. J. Mathar_, May 05 2013