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A305955 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0
0, 7, 132, 11142, 2617757, 1909062568, 4251930563544, 29035257774709570, 607160473609338803438 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A305961.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305961.

Sequence in context: A220257 A220321 A247597 * A051832 A103050 A110111

Adjacent sequences:  A305952 A305953 A305954 * A305956 A305957 A305958

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 15 2018

STATUS

approved

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Last modified September 26 10:50 EDT 2022. Contains 356997 sequences. (Running on oeis4.)