A299454 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 18, 19, 48, 175, 508, 1522, 5065, 16968, 56041, 187865, 632318, 2129542, 7184550, 24247946, 81877297, 276519444, 934064187, 3155663032, 10661937499, 36024652028, 121723990676, 411304232139, 1389808116350, 4696240793449

Offset

1,2

Comments

Column 4 of A299458.

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

Crossrefs

Cf. A299458.

Sequence in context: A041650 A041648 A034122 * A041664 A041662 A300092

Adjacent sequences: A299451 A299452 A299453 * A299455 A299456 A299457

Keyword

nonn

Author

R. H. Hardin, Feb 10 2018

Status

approved