OFFSET
0,2
REFERENCES
E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways vol. 2, 598-600.
M. Gardner, Mathematical Games, Sci. Amer. (Jan, May 1973).
LINKS
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Mar 08 2020
STATUS
approved