OFFSET
1,3
COMMENTS
Octal games .4RZj, R=5,7, Z=4,5,6,7, j=0,1,2,3 have values a(n-1). From [Flammenkamp], sequence is eventually periodic with period 60620715. The last exception is at n=160949017. - Eric M. Schmidt, Feb 22 2017
REFERENCES
E. R. Berlekamp, J. H. Conway and R. K. Guy, Winning Ways, Academic Press, NY, 2 vols., 1982; see Chapter 4.
LINKS
Eric M. Schmidt, Table of n, a(n) for n = 1..10000
Achim Flammenkamp, Sprague-Grundy Values of Octal-Games
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane and Sue Pope, May 29 2002
EXTENSIONS
Definition corrected and sequence extended by Eric M. Schmidt, Feb 22 2017
STATUS
approved