A298918 Number of n X n 0..1 arrays with every element equal to 1, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 1, 3, 9, 19, 31, 199, 330, 1377, 6627, 23223, 113179, 849856, 5207476, 43357615

Offset

1,2

Comments

Diagonal of A298924.

Links

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

Example

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

Crossrefs

Cf. A298924.

Sequence in context: A231921 A321121 A093735 * A156224 A162516 A336693

Adjacent sequences: A298915 A298916 A298917 * A298919 A298920 A298921

Keyword

nonn

Author

R. H. Hardin, Jan 29 2018

Status

approved