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 A259963 #10 Jun 28 2017 17:16:11 %S A259963 11,44,52,71,84,92,136,208,252,284,291,296,436,444,468,491,601,704, %T A259963 832,918,933,976,1164,1169,1184,1276,1291,1558,1684,1699,1708,1724, %U A259963 1837,1856,2028,2080,2123,2389,2412,2536,2619,2624,2664 %N A259963 Exceptional N-positions for Epstein's Put or Take a Square game. %D A259963 R. K. Guy, Letter to N. J. A. Sloane, Aug 01, 1975. %H A259963 R. K. Guy, <a href="/A005240/a005240.pdf">Letter to N. J. A. Sloane, Aug 1975</a> %Y A259963 A subset of A005241. Cf. A005242. %K A259963 nonn %O A259963 1,1 %A A259963 _N. J. A. Sloane_, Jul 10 2015