A125529 Number of Othello shapes with unique realization at the end of the n-th ply.

1, 4, 12, 52, 196, 932, 3944, 14020, 53556, 165584, 507656, 1251972, 2988984, 5904880

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Alain Brobecker, Othello and retrograde analysis (pdf)

Alain Brobecker, programs to generate sequences

Crossrefs

Cf. A124004, A124005, A124006.

Sequence in context: A149406 A149407 A149408 * A149409 A149410 A149411

Adjacent sequences: A125526 A125527 A125528 * A125530 A125531 A125532

Keyword

fini,hard,nonn

Author

Alain Brobecker, Dec 30 2006

Extensions

Edited by Charles R Greathouse IV, Oct 28 2009

a(10)-a(12) from Dominic Hofer, Mar 04 2020

a(13) from Dominic Hofer, Feb 11 2022

Status

approved