A317696 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

21, 289, 593, 16008, 464357, 12414382, 526480617, 21681685596, 800622189621, 32130855052281, 1312119008692568, 51836224178847872, 2071718430619769621, 83585729339898936754, 3347455884395450478055, 134104196324870185800023

Offset

1,1

Comments

Column 7 of A317697.

Links

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

Example

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

Crossrefs

Cf. A317697.

Sequence in context: A305648 A316924 A317042 * A025967 A388207 A022452

Adjacent sequences: A317693 A317694 A317695 * A317697 A317698 A317699

Keyword

nonn

Author

R. H. Hardin, Aug 04 2018

Status

approved