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 A125931 #3 Oct 12 2013 15:17:34 %S A125931 1,2,1,2,3,4,5,4,1,3,2,8,2,5,4,7,6,7,2,8,2,3,7,6,7,4,5,2,1,2,1,8,4,5, %T A125931 4,10,8,1,2,1,13,11,4,5,4,8,3,2,1,2,5,4,7,6,7,10,8,9,2,7,6,7,4,5,2,8, %U A125931 2,3,13,4,5,4,3,8,1,2,1,16,11,15,14,4,8,1,2,1,2,3,4,16,4,1,3,8,9 %N A125931 Sprague-Grundy values for octal game .7137. %C A125931 Octal games 4.007, 4.017, 4.207 and 4.217 have values a(n-1). %D A125931 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982; see Chapter 4, p. 104. %K A125931 nonn %O A125931 1,2 %A A125931 _Richard Sabey_, Jan 24 2007