A302957 Number of 6Xn 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, 361, 25131, 998670, 50519822, 2766909379, 147310312318, 7792601909575, 413221140108695, 21925142145040301, 1163067389442877369, 61694202460260635301, 3272597655031259362393, 173597299390133576071391

Offset

1,2

Comments

Row 6 of A302953.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Crossrefs

Cf. A302953.

Sequence in context: A303106 A186869 A185612 * A232081 A231770 A145121

Adjacent sequences: A302954 A302955 A302956 * A302958 A302959 A302960

Keyword

nonn

Author

R. H. Hardin, Apr 16 2018

Status

approved