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 A054043 #4 Mar 30 2012 16:48:45 %S A054043 1,2,4,8,16,32,63,64,128,256,455,512,729,874,948,1024,1259,1393,1437, %T A054043 1660,1678,1831,2002,2048,4096,8192,14343,16384,22553,26666,28724, %U A054043 32768,38955,43057,45085,51260,53262,57383,63506,65536,71873 %N A054043 Grundy function for turn-at-most-6-coins game. %D A054043 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982, see p. 433. %Y A054043 Cf. A000069, A033623, A054016, A054044, etc. %K A054043 nonn,nice %O A054043 1,2 %A A054043 _N. J. A. Sloane_, Apr 29 2000