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 A073661 #6 Dec 05 2013 19:55:30 %S A073661 2,4,6,10,8,14,16,12,18,22,20,26,32,28,24,34,36,30,40,38,44,52,48,54, %T A073661 42,46,50,56,70,60,66,64,62,68,58,72,76,74,82,80,86,92,88,78,84,94,96, %U A073661 100,90,102,108,114,112,98,124,104,106,116,110,118,120,130,126,136,132 %N A073661 Rearrangement of even numbers such that a(k) + a(k+1) + 1 is a prime for all k. %Y A073661 Cf. A073662, A073664. %K A073661 nonn %O A073661 1,1 %A A073661 _Amarnath Murthy_, Aug 10 2002 %E A073661 More terms from _Hans Havermann_, Sep 23 2002