A301487 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 50, 148, 599, 2354, 9415, 38558, 158994, 657238, 2721509, 11274883, 46736042, 193836729, 804279754, 3338261393, 13859019181, 57545314726, 238962743161, 992381007429, 4121406272689, 17116902820124, 71090859437426

Offset

1,1

Comments

Column 4 of A301491.

Links

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

R. H. Hardin, Empirical recurrence of order 89

Formula

Empirical recurrence of order 89 (see link above)

Example

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

Crossrefs

Cf. A301491.

Sequence in context: A300494 A300933 A300877 * A299686 A133426 A212063

Adjacent sequences: A301484 A301485 A301486 * A301488 A301489 A301490

Keyword

nonn

Author

R. H. Hardin, Mar 22 2018

Status

approved