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 A071430 #10 Jan 09 2017 16:34:07 %S A071430 1,0,0,1,2,2,1,4,0,1,4,2,1,4,0,1,4,2,1,4,2,1,0,2,1,4,2,1,4,5,1,4,2,1, %T A071430 4,2,1,4,2,3,4,2,3,4,2,3,4,2,3,4,2,3,4,2,1,4,2,3,3,2,5,4,2,5,4,2,3,1, %U A071430 2,5,4,2,3,4,2,5,4,2,3,3,2,5,4,2,5,3,2,5,3,2,1,4,2,5,3,2,5,4,2,5,3,2 %N A071430 Sprague-Grundy values for octal game .16. %C A071430 Sequence is eventually periodic with period 149459. The last exception is at n=105350. %D A071430 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982; see Chapter 4, p. 102 %D A071430 E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Second Edition, Vol. 1, A K Peters, 2001, pp. 102, 109. %D A071430 A. Gangolli and T. Plambeck, A Note on Periodicity in Some Octal Games, International Journal of Game Theory, Vol. 18 (1989), pp. 311-320. %H A071430 Eric M. Schmidt, <a href="/A071430/b071430.txt">Table of n, a(n) for n = 1..10000</a> %H A071430 Achim Flammenkamp, <a href="http://www.uni-bielefeld.de/~achim/octal_sparse.html">Octal games</a> %K A071430 nonn %O A071430 1,5 %A A071430 _N. J. A. Sloane_ and _Sue Pope_, May 29 2002 %E A071430 Edited and extended by _Christian G. Bower_, Oct 22 2002