A300202 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 248, 29561, 13548425, 23883950854, 161892308617170, 4219465347519739696, 422854606293602673217071, 162939915121835846953153617510

Offset

1,2

Comments

Diagonal of A300208.

Links

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

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

Crossrefs

Cf. A300208.

Sequence in context: A035036 A221518 A317519 * A347107 A138323 A214817

Adjacent sequences: A300199 A300200 A300201 * A300203 A300204 A300205

Keyword

nonn

Author

R. H. Hardin, Feb 28 2018

Status

approved