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 A071435 #12 Jan 11 2017 19:51:55 %S A071435 1,1,2,2,3,1,1,4,4,3,2,2,1,1,4,2,2,6,4,4,1,1,2,2,7,1,1,4,4,3,2,2,1,1, %T A071435 4,8,2,7,4,4,1,1,2,2,7,8,1,4,4,7,2,2,1,1,4,4,2,7,7,4,1,1,2,2,7,7,1,1, %U A071435 4,7,2,2,1,1,4,4,6,2,7,4,1,1,2,2,8,8,5,1,4,7,2,2,1,1,8,8,6,7,7,4,1,1 %N A071435 Sprague-Grundy values for octal game .177. %C A071435 Octal games .450-.453 and .470-.473 have values a(n-1). %C A071435 Sequence is eventually periodic with period 20. The last exception is at n=496. %D A071435 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982; see Chapter 4, p. 102. %H A071435 Eric M. Schmidt, <a href="/A071435/b071435.txt">Table of n, a(n) for n = 1..1000</a> %H A071435 Achim Flammenkamp, <a href="http://www.uni-bielefeld.de/~achim/octal_sparse.html">Octal games</a> %H A071435 <a href="/index/Rec#order_20">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, 1). %K A071435 nonn %O A071435 1,3 %A A071435 _N. J. A. Sloane_ and _Sue Pope_, May 29 2002 %E A071435 Edited and extended by _Christian G. Bower_, Oct 22 2002