A298438 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 1, 11, 7, 214, 10681, 610525, 240137045, 176490627544, 423872214348626

Offset

1,3

Comments

Diagonal of A298444.

Links

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

Example

Some solutions for n=5
..0..1..1..0..0. .0..1..1..1..0. .0..1..1..1..0. .0..1..1..0..0
..1..1..1..0..0. .1..1..1..1..1. .1..1..0..1..1. .1..1..1..0..0
..0..1..0..0..1. .1..0..1..0..1. .1..1..1..1..1. .1..1..0..0..0
..1..1..1..0..0. .1..1..1..1..1. .1..1..0..1..1. .0..0..1..1..1
..1..1..1..0..0. .0..1..0..1..0. .0..1..1..1..0. .0..0..1..1..1

Crossrefs

Cf. A298444.

Sequence in context: A350214 A038321 A355299 * A262866 A002749 A055505

Adjacent sequences: A298435 A298436 A298437 * A298439 A298440 A298441

Keyword

nonn

Author

R. H. Hardin, Jan 19 2018

Status

approved