A302474 Number of 4Xn 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 34, 250, 1401, 10264, 78679, 584333, 4330427, 32116855, 238854305, 1774890111, 13186901755, 97987405188, 728115173717, 5410378555145, 40202636764567, 298731900955463, 2219776401635593, 16494405056538952, 122564331015474402

Offset

1,2

Comments

Row 4 of A302472.

Links

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

R. H. Hardin, Empirical recurrence of order 63

Formula

Empirical recurrence of order 63 (see link above)

Example

Some solutions for n=5
..0..0..1..1..0. .0..1..0..0..1. .0..0..0..1..1. .0..0..1..1..0
..1..1..1..0..1. .1..0..1..1..0. .1..1..0..0..1. .1..1..1..0..0
..0..1..0..0..0. .0..0..1..1..0. .0..1..1..0..1. .1..0..1..0..1
..0..0..1..1..0. .0..1..1..0..0. .0..0..0..1..1. .0..0..0..1..0

Crossrefs

Cf. A302472.

Sequence in context: A233300 A281052 A020872 * A183319 A190422 A209951

Adjacent sequences: A302471 A302472 A302473 * A302475 A302476 A302477

Keyword

nonn

Author

R. H. Hardin, Apr 08 2018

Status

approved