A303679 Number of nX5 0..1 arrays with every element unequal to 0, 1 or 3 king-move adjacent elements, with upper left element zero.

8, 31, 25, 44, 76, 110, 150, 212, 306, 458, 684, 1006, 1462, 2132, 3122, 4586, 6732, 9870, 14454, 21172, 31026, 45482, 66668, 97710, 143190, 209844, 307538, 450730, 660588, 968142, 1418870, 2079444, 3047570, 4466442, 6545900, 9593486, 14059926

Offset

1,1

Comments

Column 5 of A303682.

Links

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

Formula

Empirical: a(n) = a(n-1) +a(n-4) +a(n-6) for n>10

Example

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

Crossrefs

Cf. A303682.

Sequence in context: A027146 A302409 A226968 * A304218 A304130 A305479

Adjacent sequences: A303676 A303677 A303678 * A303680 A303681 A303682

Keyword

nonn

Author

R. H. Hardin, Apr 28 2018

Status

approved