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A291187
Number of 2 X n Sudoku grids ((2*n) X (2*n) grids divided into 2 X n boxes).
1
288, 28200960, 29136487207403520, 1903816047972624930994913280000
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..5.
Kjell Fredrik Pettersen (after work by Ed Russell),
There are 4743933602050718 essentially different Sudoku 2x5 grids
. In A. F. Jarvis,
Sudoku enumeration problems
, 2008.
Ed Russell,
There are 1673187 essentially different Sudoku 2x4 grids
. In A. F. Jarvis,
Sudoku enumeration problems
, 2008.
Ed Russell and Frazer Jarvis,
There are 49 essentially different Sudoku 2x3 grids
, 2008.
Jordy Vanpoucke,
Mutually orthogonal latin squares and their generalizations
Wikipedia,
Mathematics of Sudoku
CROSSREFS
Cf.
A107739
,
A291188
.
Sequence in context:
A047805
A173150
A282332
*
A296608
A306651
A272164
Adjacent sequences:
A291184
A291185
A291186
*
A291188
A291189
A291190
KEYWORD
nonn
,
more
AUTHOR
Seiichi Manyama
, Aug 19 2017
STATUS
approved
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Last modified June 20 08:07 EDT 2024. Contains 373512 sequences. (Running on oeis4.)