A300940 Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 3, 12, 38, 75, 186, 530, 1401, 3811, 10666, 29764, 85074, 243478, 700526, 2028715, 5890335, 17145198, 50000931, 145968525, 426553602, 1247498091, 3650210391, 10684555961, 31283438794, 91612270064, 268323435201, 785979716062

Offset

1,1

Comments

Column 4 of A300944.

Links

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

Example

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

Crossrefs

Cf. A300944.

Sequence in context: A130180 A245288 A104587 * A131939 A205522 A111744

Adjacent sequences: A300937 A300938 A300939 * A300941 A300942 A300943

Keyword

nonn

Author

R. H. Hardin, Mar 16 2018

Status

approved