A304139 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

1, 49, 16, 17, 83, 39, 34, 749, 257, 102, 8887, 2522, 603, 104361, 35729, 8663, 1216402, 616854, 186354, 14154101, 10863678, 4279443, 165279952, 184917504, 96964504, 1956483921, 3045215141, 2158260140, 23979343195, 49531610793, 48022478670

Offset

1,2

Comments

Column 6 of A304141.

Links

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

Example

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

Crossrefs

Cf. A304141.

Sequence in context: A278107 A218167 A145583 * A305045 A065787 A033369

Adjacent sequences: A304136 A304137 A304138 * A304140 A304141 A304142

Keyword

nonn

Author

R. H. Hardin, May 07 2018

Status

approved