A304064 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

0, 702, 9889, 418382, 15790468, 598203550, 23106300531, 882586820005, 33883349300951, 1298742292582865, 49802609445810069, 1909600274607825976, 73221979973762752997, 2807623345042622681366, 107655520424372228194333

Offset

1,2

Comments

Column 7 of A304065.

Links

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

Example

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

Crossrefs

Cf. A304065.

Sequence in context: A305071 A203350 A321641 * A305456 A305021 A316685

Adjacent sequences: A304061 A304062 A304063 * A304065 A304066 A304067

Keyword

nonn

Author

R. H. Hardin, May 05 2018

Status

approved