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A298896 Number of n X n 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
0, 1, 1, 4, 32, 963, 44186, 9994726, 4485120457, 6962969227448 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Diagonal of A298902.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298902.

Sequence in context: A132854 A136471 A243918 * A231991 A028369 A081790

Adjacent sequences:  A298893 A298894 A298895 * A298897 A298898 A298899

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 28 2018

STATUS

approved

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Last modified September 18 03:52 EDT 2021. Contains 347504 sequences. (Running on oeis4.)