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.

0, 2, 42, 3382, 1118946, 1459438050, 7332741364328, 143431562727241070, 10922269761078538034876, 3236762187328159003256067178, 3732763619664688373840578545273092

Offset

1,2

Comments

Diagonal of A278157.

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

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

Adjacent sequences: A278147 A278148 A278149 * A278151 A278152 A278153

Keyword

nonn

Author

R. H. Hardin, Nov 13 2016

Status

approved