A298901 Number of nX7 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 8, 12, 56, 471, 4689, 44186, 522001, 5379458, 62969638, 689301117, 7995632432, 89669878606, 1030894396261, 11694235466700, 133810754113662, 1523947269885410, 17410346219635865, 198543925466100523

Offset

1,2

Comments

Column 7 of A298902.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0..1..1. .0..0..1..1..0..0..0. .0..0..0..0..0..1..1
..0..0..1..0..0..1..1. .0..0..1..1..0..0..0. .0..0..0..0..0..1..1
..0..1..1..1..1..1..1. .0..0..1..0..0..0..0. .0..0..0..0..0..0..1
..0..0..1..1..1..0..0. .0..0..1..1..0..1..1. .1..1..1..1..0..1..1
..0..0..1..1..1..0..0. .0..0..1..1..1..1..1. .1..1..1..1..1..1..1

Crossrefs

Cf. A298902.

Sequence in context: A022668 A286360 A212815 * A368125 A305236 A069186

Adjacent sequences: A298898 A298899 A298900 * A298902 A298903 A298904

Keyword

nonn

Author

R. H. Hardin, Jan 28 2018

Status

approved