A304140 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

1, 99, 33, 25, 135, 34, 48, 785, 96, 164, 5607, 688, 1198, 43126, 7146, 13284, 344363, 85130, 174124, 2842665, 1101826, 2429578, 24588566, 15000202, 34580418, 227836525, 209686868, 495041722, 2307698343, 2968753906, 7098677686

Offset

1,2

Comments

Column 7 of A304141.

Links

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

Example

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

Crossrefs

Cf. A304141.

Sequence in context: A246222 A309232 A360376 * A305046 A316732 A033419

Adjacent sequences: A304137 A304138 A304139 * A304141 A304142 A304143

Keyword

nonn

Author

R. H. Hardin, May 07 2018

Status

approved