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A296581 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1's. 0
2, 9, 83, 2458, 214830, 52756072, 39585589653, 84537581697810, 511595224386235896, 8854271989464391363762, 434511224471903201800210223 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A296588.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A296588.

Sequence in context: A087798 A113146 A323769 * A069234 A086929 A193466

Adjacent sequences:  A296578 A296579 A296580 * A296582 A296583 A296584

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 16 2017

STATUS

approved

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Last modified June 12 08:13 EDT 2021. Contains 344943 sequences. (Running on oeis4.)