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A301437
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
1, 8, 232, 23672, 8525992, 10857946336, 48849438137664, 776405369595079784, 43592748615027181849168, 8646411638193087437385791320, 6058323543759078862550444562319392
OFFSET
1,2
COMMENTS
Diagonal of A301443.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..1..0..0..0. .0..1..0..0..1. .0..0..1..0..0. .0..0..1..1..1
..0..1..0..0..0. .0..1..0..1..1. .1..1..0..1..0. .0..1..1..1..1
..0..0..1..1..0. .1..0..1..0..0. .0..1..1..1..1. .0..0..0..0..0
..1..1..1..0..0. .0..0..1..0..0. .0..0..0..0..0. .1..0..0..0..0
CROSSREFS
Cf. A301443.
Sequence in context: A222525 A214351 A303450 * A111836 A288546 A134504
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 21 2018
STATUS
approved