A298081 Number of n X n 0..1 arrays with every element equal to 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

0, 1, 0, 10, 154, 2767, 65218, 4883926, 603770100, 117856794865

Offset

1,4

Comments

Diagonal of A298087.

Links

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

Example

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

Crossrefs

Cf. A298087.

Sequence in context: A240196 A048907 A061654 * A240374 A261744 A229284

Adjacent sequences: A298078 A298079 A298080 * A298082 A298083 A298084

Keyword

nonn

Author

R. H. Hardin, Jan 12 2018

Status

approved