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A278150
Number of n X n 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.
1
0, 2, 42, 3382, 1118946, 1459438050, 7332741364328, 143431562727241070, 10922269761078538034876, 3236762187328159003256067178, 3732763619664688373840578545273092
OFFSET
1,2
COMMENTS
Diagonal of A278157.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..0. .0..0..0..0. .0..0..0..1. .0..0..1..1. .0..0..0..0
..0..1..1..0. .1..1..1..0. .1..1..0..1. .1..1..0..0. .1..1..1..0
..1..1..0..1. .0..1..1..0. .1..0..0..1. .1..1..0..1. .1..0..0..1
..1..0..1..0. .0..0..0..1. .1..1..0..1. .0..0..1..1. .0..0..1..1
CROSSREFS
Cf. A278157.
Sequence in context: A152286 A293864 A208297 * A193271 A193272 A193273
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 13 2016
STATUS
approved