A305174 - OEIS

A305174

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

0, 702, 2120, 93426, 2416954, 40793823, 1069089450, 24206013485, 531063626743, 12407097768788, 281328842182848, 6388727575554547, 146191463128504367, 3327872095993174915, 75847281259153846487, 1729880848316744980239

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

OFFSET

1,2

COMMENTS

Column 7 of A305175.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305175.

Sequence in context: A237632 A304155 A305508 * A316762 A158655 A305071

Adjacent sequences: A305171 A305172 A305173 * A305175 A305176 A305177

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 26 2018

STATUS

approved