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A297676 Number of nXn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s. 0
2, 11, 150, 4633, 401678, 78957968, 41030621948, 49892385650107, 157266548152111938, 1187668466030040777022, 22731639382952184172610914, 1058867886808501107531538859306 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A297682.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A297682.

Sequence in context: A006122 A111014 A171184 * A049462 A227328 A287149

Adjacent sequences:  A297673 A297674 A297675 * A297677 A297678 A297679

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 03 2018

STATUS

approved

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Last modified September 20 22:20 EDT 2019. Contains 327252 sequences. (Running on oeis4.)