A318094 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

2, 50, 220, 1563, 9193, 57744, 356786, 2215533, 13752047, 85343361, 529807380, 3288466317, 20413201710, 126710229626, 786538847475, 4882316701191, 30306289156276, 188121896133891, 1167739500871746, 7248574819342407

Offset

1,1

Comments

Column 4 of A318098.

Links

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

R. H. Hardin, Empirical recurrence of order 72

Formula

Empirical recurrence of order 72 (see link above)

Example

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

Crossrefs

Cf. A318098.

Sequence in context: A231082 A318426 A265962 * A226408 A226337 A048610

Adjacent sequences: A318091 A318092 A318093 * A318095 A318096 A318097

Keyword

nonn

Author

R. H. Hardin, Aug 16 2018

Status

approved