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A297513 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1's. 0
1, 5, 49, 624, 19187, 1995817, 424461759, 156485261895, 131486609293366, 286750273002748274, 1339067174781497822377 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297519.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A297519.

Sequence in context: A112241 A216483 A243945 * A228511 A116873 A324361

Adjacent sequences:  A297510 A297511 A297512 * A297514 A297515 A297516

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2017

STATUS

approved

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Last modified November 25 11:32 EST 2020. Contains 338623 sequences. (Running on oeis4.)