A298174 Number of n X n 0..1 arrays with every element equal to 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 1, 0, 8, 34, 87, 181, 1380, 4176, 28357, 122406, 826418, 4451708, 30672159, 202655696, 1636350467

Offset

1,4

Comments

Diagonal of A298177.

Links

Table of n, a(n) for n=1..16.

Example

Some solutions for n=7
..0..1..1..1..0..1..1. .0..0..0..0..0..1..1. .0..0..1..0..1..0..0
..0..0..1..0..0..0..1. .0..1..1..1..1..0..1. .0..1..0..1..0..1..0
..0..1..1..1..1..1..0. .0..1..0..0..1..0..1. .0..1..0..1..0..1..0
..1..0..0..0..0..0..1. .0..1..0..0..1..0..1. .0..1..0..1..0..1..0
..0..1..1..1..1..1..0. .0..1..1..1..1..0..1. .0..1..0..1..0..1..0
..1..0..0..0..1..0..0. .1..0..0..0..0..0..1. .0..1..0..1..0..1..0
..1..1..0..1..1..1..0. .1..1..1..1..1..1..1. .0..0..1..0..1..0..0

Crossrefs

Cf. A298177.

Sequence in context: A024847 A154516 A212744 * A249743 A298140 A301887

Adjacent sequences: A298171 A298172 A298173 * A298175 A298176 A298177

Keyword

nonn

Author

R. H. Hardin, Jan 14 2018

Status

approved