A298550 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 18, 14, 33, 74, 226, 716, 2211, 6851, 21462, 67050, 211080, 665938, 2101358, 6629389, 20925470, 66062395, 208588663, 658697076, 2080208913, 6569640501, 20748537569, 65530617366, 206970394282, 653697367667, 2064661074519

Offset

1,2

Comments

Column 4 of A298554.

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=7
..0..1..1..0. .0..1..1..0. .0..0..1..0. .0..0..1..1. .0..0..1..1
..1..1..0..0. .0..0..1..1. .1..0..1..1. .0..0..1..0. .0..0..1..0
..1..0..1..1. .1..1..0..1. .0..0..0..0. .1..1..1..1. .1..1..1..1
..0..1..1..1. .1..1..1..0. .1..0..0..1. .0..1..1..0. .0..1..1..0
..0..1..1..1. .1..1..1..0. .0..0..0..0. .1..1..1..1. .1..1..1..1
..0..0..0..0. .0..0..0..0. .1..0..1..1. .0..0..1..0. .0..1..0..0
..0..1..0..1. .1..0..1..0. .0..0..1..1. .1..0..1..1. .1..1..0..1

Crossrefs

Cf. A298554.

Sequence in context: A077810 A232505 A297939 * A160901 A159502 A077668

Adjacent sequences: A298547 A298548 A298549 * A298551 A298552 A298553

Keyword

nonn

Author

R. H. Hardin, Jan 21 2018

Status

approved