A298324 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

1, 37, 78, 382, 1998, 11727, 73321, 464117, 2989370, 19362307, 125563388, 815538265, 5299610378, 34445631856, 223915162213, 1455642632182, 9463186137940, 61521343869951, 399960023169402, 2600211175972790

Offset

1,2

Comments

Column 4 of A298328.

Links

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

R. H. Hardin, Empirical recurrence of order 67

Formula

Empirical recurrence of order 67 (see link above)

Example

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

Crossrefs

Cf. A298328.

Sequence in context: A071884 A216287 A216329 * A346559 A256585 A211725

Adjacent sequences: A298321 A298322 A298323 * A298325 A298326 A298327

Keyword

nonn

Author

R. H. Hardin, Jan 17 2018

Status

approved