OFFSET
1,2
REFERENCES
E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982, see p. 502.
R. K. Guy, Fair Game: How to play impartial combinatorial games, COMAP's Mathematical Exploration Series, 1989; see p. 88.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 03 2016
EXTENSIONS
Extended beyond 72 by R. J. Mathar, May 07 2016
STATUS
approved