A266078 Number of nX5 integer arrays with each element equal to the number of horizontal and vertical neighbors differing from itself by exactly one.

1, 1, 5, 7, 29, 29, 55, 115, 221, 443, 851, 1659, 3318, 6531, 12883, 25491, 50374, 99493, 196918, 389027, 770195, 1523153, 3012689, 5958639, 11790926, 23319020, 46141333, 91261509, 180569396, 357189221, 706693599, 1397946605, 2765830557, 5471342440

Offset

1,3

Comments

Column 5 of A266081.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..2..3..2..0..0....0..0..0..0..0....0..0..0..0..0....0..2..3..2..0
..3..4..3..0..0....0..0..0..0..0....0..2..3..2..0....0..3..4..3..0
..2..3..2..0..0....0..0..0..0..0....0..3..4..3..0....0..2..3..2..0
..0..0..0..0..0....0..0..0..0..0....0..2..3..2..0....0..0..0..0..0

Crossrefs

Cf. A266081.

Sequence in context: A307100 A229337 A227857 * A147993 A213901 A087901

Adjacent sequences: A266075 A266076 A266077 * A266079 A266080 A266081

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved