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A300924 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
0, 3, 75, 6638, 2244335, 2875574552, 13930396115571, 255391114062230046, 17719358335864533713147, 4652507709547839626397575180, 4622990422099585649225050467889127 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300930.

LINKS

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

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

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

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

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

CROSSREFS

Cf. A300930.

Sequence in context: A249938 A195263 A034940 * A183290 A336062 A320306

Adjacent sequences:  A300921 A300922 A300923 * A300925 A300926 A300927

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 15 2018

STATUS

approved

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Last modified August 10 00:18 EDT 2022. Contains 356026 sequences. (Running on oeis4.)