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.

0, 3, 75, 6638, 2244335, 2875574552, 13930396115571, 255391114062230046, 17719358335864533713147, 4652507709547839626397575180, 4622990422099585649225050467889127

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