A125528 Number of different Othello shapes at the end of the n-th ply.

1, 4, 12, 54, 220, 1130, 5568, 26966, 132037, 589652, 2601811, 10147378, 38356054, 129698048

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: A149416 A149417 A151478 * A124005 A149418 A149419

Adjacent sequences: A125525 A125526 A125527 * A125529 A125530 A125531

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