A298385 Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

2, 52, 223, 996, 5180, 26926, 135226, 690918, 3547086, 18140017, 92825596, 475512514, 2435109783, 12469673140, 63863260360, 327072500829, 1675063501190, 8578763890816, 43935874769921, 225015889086384, 1152411732625826

Offset

1,1

Comments

Column 4 of A298389.

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above)

Example

Some solutions for n=7
..0..1..0..1. .0..1..0..1. .0..0..0..0. .0..1..0..0. .0..0..0..1
..0..1..0..1. .0..1..1..0. .1..1..1..1. .1..0..1..1. .1..1..0..1
..1..0..0..1. .1..1..1..1. .0..0..1..0. .0..1..1..1. .1..0..0..0
..0..1..0..1. .0..1..0..1. .1..1..1..0. .1..1..0..0. .0..1..1..1
..0..0..1..1. .1..0..1..0. .0..1..1..1. .0..1..1..0. .1..1..1..1
..0..1..0..1. .1..0..1..0. .0..0..1..0. .0..1..1..1. .0..1..0..0
..1..1..0..1. .0..1..0..0. .1..1..0..1. .0..0..0..1. .0..1..1..1

Crossrefs

Cf. A298389.

Sequence in context: A298556 A298766 A299563 * A299303 A299461 A300104

Adjacent sequences: A298382 A298383 A298384 * A298386 A298387 A298388

Keyword

nonn

Author

R. H. Hardin, Jan 18 2018

Status

approved