A300775 Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 41, 330, 3482, 78932, 1413931, 27354464, 538564737, 10457318118, 204864839579, 4003320568347, 78291006560110, 1531185041826193, 29942985522306312, 585589511612781035, 11452027270290422629, 223961431020068238434

Offset

1,2

Comments

Column 7 of A300776.

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

Crossrefs

Cf. A300776.

Sequence in context: A340465 A282867 A222990 * A232857 A232793 A219080

Adjacent sequences: A300772 A300773 A300774 * A300776 A300777 A300778

Keyword

nonn

Author

R. H. Hardin, Mar 12 2018

Status

approved