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 A073664 #5 Dec 05 2013 19:55:30 %S A073664 2,4,6,18,28,56,60,64,68,72,80,116,126,152,170,184,200,214,234,248, %T A073664 276,290,328,330,334,346,360,402,408,416,438,472,512,524,578,598,662, %U A073664 702,744,786,810,824,864,908,968,1008,1030,1032,1052,1076,1172,1182,1220 %N A073664 Even numbers which retain their relative position in A073661 (are not disturbed in the rearrangement process). %Y A073664 Cf. A073661, A073662. %K A073664 nonn %O A073664 0,1 %A A073664 _Amarnath Murthy_, Aug 10 2002 %E A073664 More terms from _Hans Havermann_, Sep 23 2002