A305648 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

21, 289, 430, 13498, 304707, 7215825, 283691091, 10435409852, 345636487600, 12593852870880, 464418610630494, 16562715976926678, 599066844914471815, 21849132612659676089, 790837634816109991358, 28651101585036924255936

Offset

1,1

Comments

Column 7 of A305649.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A305649.

Sequence in context: A305917 A316238 A317159 * A316924 A317042 A317696

Adjacent sequences: A305645 A305646 A305647 * A305649 A305650 A305651

Keyword

nonn

Author

R. H. Hardin, Jun 07 2018

Status

approved