A298378 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 18, 18, 47, 172, 504, 1502, 5011, 16723, 55130, 184504, 619998, 2084868, 7024818, 23676837, 79847524, 269324641, 908631125, 3065973546, 10346238353, 34915387305, 117832494393, 397671686820, 1342113470626, 4529581358627

Offset

1,2

Comments

Column 4 of A298382.

Links

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

R. H. Hardin, Empirical recurrence of order 71

Formula

Empirical recurrence of order 71 (see link above)

Example

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

Crossrefs

Cf. A298382.

Sequence in context: A040307 A022352 A211411 * A299245 A352365 A050686

Adjacent sequences: A298375 A298376 A298377 * A298379 A298380 A298381

Keyword

nonn

Author

R. H. Hardin, Jan 18 2018

Status

approved