A297914 Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

1, 864, 2016, 35788, 789026, 15983426, 362523451, 7903384843, 176308045666, 3941879866879, 87755060397182, 1960425981130977, 43770946796249155, 977291527301161623, 21823838569731609645, 487330565461513151643

Offset

1,2

Comments

Column 7 of A297915.

Links

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

Example

Some solutions for n=4
..0..0..1..0..1..1..1. .0..1..0..1..1..1..0. .0..0..1..0..1..1..0
..0..0..1..1..1..0..1. .1..1..0..0..1..0..0. .0..0..0..0..0..1..1
..1..1..0..0..0..0..1. .0..0..1..0..1..0..1. .1..1..1..1..1..0..0
..1..0..0..1..0..1..1. .1..0..0..1..1..0..0. .1..1..0..1..0..0..1

Crossrefs

Cf. A297915.

Sequence in context: A184451 A203662 A179671 * A298507 A097982 A298327

Adjacent sequences: A297911 A297912 A297913 * A297915 A297916 A297917

Keyword

nonn

Author

R. H. Hardin, Jan 08 2018

Status

approved