A317270 - OEIS

A317270

Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 908, 3302, 111073, 2915690, 52389467, 1396521994, 32539573668, 748729425556, 18093921657774, 426211079158160, 10085719543230970, 239658702945504336, 5674853493859268462, 134548196406117591102, 3190426160734830130858

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 7 of A317271.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..1..1..0..1..1..0. .0..1..0..1..0..1..0. .0..1..1..0..1..1..0

..0..1..0..0..1..0..1. .0..1..0..1..0..1..0. .0..1..0..1..1..0..1

..0..0..0..0..1..1..0. .0..0..0..0..0..0..0. .0..1..1..0..1..1..0

..1..1..0..1..0..1..1. .1..1..0..1..0..1..0. .1..1..1..0..1..1..1

..0..0..0..1..0..1..0. .0..0..1..0..0..1..0. .0..0..1..1..0..0..0

CROSSREFS

Cf. A317271.

Sequence in context: A304550 A316375 A306135 * A002617 A304418 A316243

Adjacent sequences: A317267 A317268 A317269 * A317271 A317272 A317273

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 25 2018

STATUS

approved