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 A071447 #9 Aug 27 2015 13:20:35 %S A071447 1,1,1,2,0,2,3,1,1,4,0,4,5,1,3,2,0,2,1,1,1,4,0,2,6,1,6,4,0,4,1,1,1,2, %T A071447 0,2,6,1,5,4,0,4,6,1,3,2,0,2,1,1,1,8,0,2,6,1,6,4,0,4,1,1,1,2,0,2,6,1, %U A071447 1,4,0,4,6,1,3,2,0,2,1,1,1,4,0,2,6,1,6,4,0,4,1,1,1,2,0,2,6,1,5,4,0,4,6,1,3 %N A071447 Sprague-Grundy values for octal game .1137. %C A071447 Octal game .017 has values a(n-1). %C A071447 Sequence is eventually periodic with period 60. The only exceptions are n=0, 7 and 13. %D A071447 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982; see Chapter 4, p. 104. %H A071447 Achim Flammenkamp, <a href="http://www.uni-bielefeld.de/~achim/octal_sparse.html">Octal games</a> %H A071447 <a href="/index/Rec#order_60">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1). %K A071447 nonn %O A071447 1,4 %A A071447 _N. J. A. Sloane_ and _Sue Pope_, May 29 2002 %E A071447 Edited and extended by _Christian G. Bower_, Nov 11 2002