A071509 Sprague-Grundy values for octal games .1777 and .17771.

1, 1, 2, 2, 3, 4, 1, 1, 6, 6, 3, 2, 2, 1, 1, 6, 6, 8, 4, 4, 5, 10, 1, 1, 8, 3, 3, 4, 4, 7, 6, 6, 8, 8, 4, 1, 1, 6, 7, 8, 4, 4, 5, 10, 8, 1, 1, 15, 5, 4, 4, 7, 6, 6, 1, 1, 4, 3, 3, 6, 1, 1, 4, 4, 3, 8, 8, 1, 1, 10, 14, 8, 4, 13, 6, 6, 1, 1, 8, 3, 3, 13, 1, 1, 6

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

Sequence in context: A071478 A071477 A071507 * A323731 A288248 A159804

Adjacent sequences: A071506 A071507 A071508 * A071510 A071511 A071512

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