A303886 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

1, 272, 256, 2130, 4964, 24985, 88901, 384168, 1517262, 6387363, 26128622, 109286469, 453167087, 1893484140, 7895422217, 33012465799, 138034364553, 577776514184, 2419883706139, 10139777334645, 42517613567822

Offset

1,2

Comments

Column 6 of A303888.

Links

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

Example

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

Crossrefs

Cf. A303888.

Sequence in context: A287232 A332978 A214012 * A305279 A005933 A112820

Adjacent sequences: A303883 A303884 A303885 * A303887 A303888 A303889

Keyword

nonn

Author

R. H. Hardin, May 02 2018

Status

approved