A305916 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

13, 125, 135, 1129, 8135, 61467, 811996, 9980597, 112886453, 1460881086, 18752755601, 231554846353, 2940627858430, 37506163354915, 472902430224115, 5989532918267295, 76065097315726443, 963285418655935224

Offset

1,1

Comments

Column 6 of A305918.

Links

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

Example

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

Crossrefs

Cf. A305918.

Sequence in context: A202131 A152583 A304353 * A134550 A316237 A317158

Adjacent sequences: A305913 A305914 A305915 * A305917 A305918 A305919

Keyword

nonn

Author

R. H. Hardin, Jun 14 2018

Status

approved