A124005 -id:A124005 - cp's OEIS frontend

A124004 Number of possible Reversi games at the end of the n-th ply.

1, 4, 12, 56, 244, 1396, 8200, 55092, 390216, 3005288, 24571056, 212258216, 1939879668, 18429618408, 184041761768, 1891831332208, 20301171282452, 222742563853912, 2534535926617852, 29335558770589276, 349980362625040712, 4228388321175157140

Offset: 0

Alain Brobecker (abrobecker(AT)yahoo.com), Nov 01 2006, Dec 30 2006

Reversi is the older name for the game. Othello is a more recent trade name.

Alain Brobecker, Othello and retrograde analysis (pdf)
Alain Brobecker, programs to generate sequences
Alain Brobecker, othello.c
Dominic Hofer, documentation and project to generate sequence

Cf. A124005, A124006.

a(15)-a(18) from Paul Byrne, Mar 08 2008
Edited by Charles R Greathouse IV, Oct 28 2009
a(19) from Dominic Hofer, Oct 21 2014
a(20) from Dominic Hofer, Jan 11 2021
a(21) from Dominic Hofer, Feb 11 2021

A124006 Number of Othello positions with unique realization at the end of the n-th ply.

Original entry on oeis.org

1, 4, 12, 52, 228, 1192, 6160, 33344, 191380, 1072232, 6416600, 35990544, 212278256, 1145811772

Offset: 0

Alain Brobecker, Nov 01 2006

Alain Brobecker, Othello and retrograde analysis (pdf)
Alain Brobecker, programs to generate sequences
Alain Brobecker, othello.c

Cf. A124004, A124005.

a(8)-a(9) from Alain Brobecker, Dec 30 2006
Edited by Charles R Greathouse IV, Oct 28 2009
a(10)-a(12) from Dominic Hofer, Sep 27 2019
a(13) from Dominic Hofer, Feb 11 2022

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

Original entry on oeis.org

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

Offset: 0

Alain Brobecker, Dec 30 2006

Alain Brobecker, Othello and retrograde analysis (pdf)
Alain Brobecker, programs to generate sequences

Cf. A124004, A124005, A124006.

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

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

Original entry on oeis.org

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

Offset: 0

Alain Brobecker, Dec 30 2006

Alain Brobecker, Othello and retrograde analysis (pdf)
Alain Brobecker, programs to generate sequences

Cf. A124004, A124005, A124006.

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

cp's OEIS Frontend

A124004 Number of possible Reversi games at the end of the n-th ply.

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A124006 Number of Othello positions with unique realization at the end of the n-th ply.

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

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

Views

Author

Keywords

Links

Crossrefs

Extensions