A007565 Number of Go games with n moves.

1, 362, 130683, 47046243, 16889859363, 6046709375131

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• fini
• nice
• hard

Comments

No value up to a(5) in this sequence is prime. The semiprimes in the sequence begin: 362 = 2 * 181, 6046709375131 = 19 * 318247861849. - Jonathan Vos Post, Apr 02 2011

The sequence is based on a 19 X 19 board which is empty in the initial state. The terms are the partial sums of A048289. - M. F. Hasler, Nov 24 2016

References

• Cho Chikun, Go: a Complete Introduction to the Game, Kiseido Publishers, Tokyo, 1997.
• N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
• H. Taylor, personal communication. [Scanned letter will be added. - N. J. A. Sloane, Nov 25 2016]

Links

• D. Forgues, Game of Go, OEIS wiki, Feb. 2016.
• Eric Weisstein's World of Mathematics, Go.
• Wikipedia, Go.

Crossrefs

Cf. A048289.

Formula

a(n) = a(n-1) + A048289(n) for n > 0. - M. F. Hasler, Nov 24 2016

Extensions

2 more terms from Arlin Anderson (starship1(AT)gmail.com)