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A302947 Number of nXn 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
0, 3, 86, 6531, 2104533, 2766909379, 13578993819785, 252836915021232264, 18036285050227905448214, 4921162186957679442128426852 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302953.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302953.

Sequence in context: A292830 A185142 A279020 * A326948 A159053 A172494

Adjacent sequences:  A302944 A302945 A302946 * A302948 A302949 A302950

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 16 2018

STATUS

approved

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Last modified March 29 21:32 EDT 2020. Contains 333117 sequences. (Running on oeis4.)