A299557 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 18, 15, 34, 77, 230, 734, 2261, 7050, 22143, 69461, 219276, 693784, 2194918, 6942360, 21968267, 69526220, 220063117, 696615382, 2205253721, 6981275736, 22101410710, 69970396941, 221520928868, 701324741453, 2220376409611

Offset

1,2

Comments

Column 4 of A299561.

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=9
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..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
..0..0..0..0. .0..1..0..1. .0..0..0..0. .1..1..1..1. .0..0..0..0
..1..1..1..1. .1..0..0..1. .1..1..1..1. .1..1..1..1. .1..1..1..1
..1..0..0..1. .1..1..1..1. .1..0..0..1. .0..0..0..0. .1..0..0..1
..1..0..1..0. .0..0..0..0. .0..1..0..1. .0..0..0..0. .0..1..0..1
..1..1..1..0. .0..0..0..0. .0..1..0..1. .0..0..0..0. .0..1..0..1
..1..0..0..1. .0..0..0..0. .0..1..0..1. .1..1..1..1. .1..0..0..1
..0..0..1..1. .0..0..0..0. .0..0..1..1. .1..1..1..1. .1..1..1..1

Crossrefs

Cf. A299561.

Sequence in context: A159502 A077668 A298723 * A079293 A070646 A094381

Adjacent sequences: A299554 A299555 A299556 * A299558 A299559 A299560

Keyword

nonn

Author

R. H. Hardin, Feb 12 2018

Status

approved