A300371 - OEIS

A300371

Number of nX7 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 6, 16, 39, 270, 1592, 12042, 75739, 490425, 3084820, 19634393, 129519588, 829432020, 5341866361, 34667291397, 223006749453, 1438573920539, 9290258941352, 59927615962595, 386783857393798, 2495707675837699

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 7 of A300372.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..0..0..0..0..0. .0..0..0..0..1..1..0. .0..0..0..0..1..1..0

..0..1..1..1..1..1..0. .0..1..1..0..1..0..0. .0..1..1..0..1..0..0

..1..0..0..1..0..1..0. .1..1..0..1..0..1..0. .0..1..0..0..1..1..1