A300933 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 50, 143, 505, 1534, 4781, 15292, 48838, 158036, 513942, 1667199, 5414178, 17564422, 56945634, 184689939, 599062331, 1943671897, 6307957298, 20474330692, 66462754716, 215762437471, 700476249766, 2274214050189, 7383913075835

Offset

1,1

Comments

Column 4 of A300937.

Links

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

R. H. Hardin, Empirical recurrence of order 95

Formula

Empirical recurrence of order 95 (see link above)

Example

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

Crossrefs

Cf. A300937.

Sequence in context: A282774 A258635 A300494 * A300877 A301487 A299686

Adjacent sequences: A300930 A300931 A300932 * A300934 A300935 A300936

Keyword

nonn

Author

R. H. Hardin, Mar 16 2018

Status

approved