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A298713 Number of nXn 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 0
0, 1, 4, 59, 3508, 563977, 193439202, 177476979652, 405759343397572 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A298719.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298719.

Sequence in context: A194534 A026586 A298064 * A058173 A074835 A060492

Adjacent sequences:  A298710 A298711 A298712 * A298714 A298715 A298716

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 2018

STATUS

approved

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Last modified December 15 22:53 EST 2018. Contains 318157 sequences. (Running on oeis4.)