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 A054046 #4 Mar 30 2012 16:48:45 %S A054046 1,2,4,8,16,32,64,128,256,511,512,1024,2048,4096,7711,8192,16384, %T A054046 26215,32768,43691,54613,65536,77013,131072,143153,184230,202940, %U A054046 262144,276813,345179,480029,524288,544139,761113,1048576,1072338 %N A054046 Grundy function for turn-at-most-9-coins game. %D A054046 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982, see p. 433. %Y A054046 Cf. A000069, A033623, A054016, A054047, etc. %K A054046 nonn,nice %O A054046 1,2 %A A054046 _N. J. A. Sloane_, Apr 29 2000