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A300798
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
1, 8, 228, 23096, 8170504, 10189867088, 44678859224720, 689135333800118172, 37384922495789864734248, 7133341171604127356105213188, 4787286947598320962893540775519384
OFFSET
1,2
COMMENTS
Diagonal of A300804.
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..0..1..0..1. .0..1..0..0..1. .0..0..1..0..0. .0..1..0..0..1
..0..1..1..1..0. .1..0..1..0..1. .0..1..1..0..1. .0..0..1..1..0
..0..1..0..1..0. .1..0..1..0..1. .0..0..1..0..0. .0..1..0..1..0
..0..0..1..1..0. .1..0..1..0..0. .0..0..0..1..0. .1..0..0..0..0
CROSSREFS
Cf. A300804.
Sequence in context: A317559 A302735 A300209 * A240299 A222525 A214351
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 13 2018
STATUS
approved