A304929 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

13, 105, 101, 374, 1034, 2653, 6426, 16855, 42256, 110818, 293243, 759597, 1962550, 5113934, 13247520, 34363929, 89475407, 232484569, 603475499, 1568532379, 4074861880, 10582600325, 27499026562, 71450610025, 185607848522

Offset

1,1

Comments

Column 6 of A304931.

Links

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

Example

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

Crossrefs

Cf. A304931.

Sequence in context: A000590 A052065 A303967 * A041316 A304667 A306170

Adjacent sequences: A304926 A304927 A304928 * A304930 A304931 A304932

Keyword

nonn

Author

R. H. Hardin, May 21 2018

Status

approved