A301783 Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

64, 8192, 772272, 75632400, 7381982784, 720677122368, 70356843337600, 6868652110439488, 670558705424435264, 65463930429261156928, 6390978398666846999104, 623925337422198984802880

Offset

1,1

Comments

Column 7 of A301784.

Links

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

R. H. Hardin, Empirical recurrence of order 46

Formula

Empirical recurrence of order 46 (see link above)

Example

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

Crossrefs

Cf. A301784.

Sequence in context: A301442 A302014 A302009 * A213417 A316807 A317524

Adjacent sequences: A301780 A301781 A301782 * A301784 A301785 A301786

Keyword

nonn

Author

R. H. Hardin, Mar 26 2018

Status

approved