A304547 Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

1, 24, 60, 418, 2186, 12281, 72713, 423041, 2465234, 14485954, 84866473, 497508155, 2918999870, 17121301618, 100431971271, 589185472211, 3456348339399, 20276248723814, 118949602782537, 697809509847641, 4093656522150681

Offset

1,2

Comments

Column 4 of A304551.

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above)

Example

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

Crossrefs

Cf. A304551.

Sequence in context: A376292 A370995 A226883 * A371174 A045558 A352343

Adjacent sequences: A304544 A304545 A304546 * A304548 A304549 A304550

Keyword

nonn

Author

R. H. Hardin, May 14 2018

Status

approved