A320363 Number of n X 7 0..1 arrays with every element unequal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 45, 1111, 32371, 1076811, 33825987, 1076542482, 34268936133, 1089237599640, 34629240586282, 1101078486409810, 35008543878056364, 1113085385544576174, 35390280162099120910, 1125225503711958393640, 35776275240752167917918, 1137498024622537240058287, 36166474387765286428939103

Offset

1,2

Links

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

Example

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

Crossrefs

Column 7 of A320364.

Sequence in context: A282929 A177728 A265615 * A140346 A268870 A387285

Adjacent sequences: A320360 A320361 A320362 * A320364 A320365 A320366

Keyword

nonn

Author

R. H. Hardin, Oct 11 2018

Status

approved