A299129 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 5, 30, 1261, 130924, 54173918, 83518793627, 421314290752028, 7208059773839169432

Offset

1,2

Comments

Diagonal of A299135.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A299135.

Sequence in context: A264861 A264864 A297472 * A255677 A256153 A238196

Adjacent sequences: A299126 A299127 A299128 * A299130 A299131 A299132

Keyword

nonn

Author

R. H. Hardin, Feb 03 2018

Status

approved