A302672 Number of 6Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 361, 2802, 21949, 316977, 3640304, 46360666, 582115385, 7102982284, 89673817840, 1109953847172, 13832059626512, 172620198739923, 2146228140110545, 26771858593225105, 333424179617097795

Offset

1,2

Comments

Row 6 of A302670.

Links

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

Example

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

Crossrefs

Cf. A302670.

Sequence in context: A176899 A361704 A302229 * A302476 A231975 A112078

Adjacent sequences: A302669 A302670 A302671 * A302673 A302674 A302675

Keyword

nonn

Author

R. H. Hardin, Apr 11 2018

Status

approved