A302474 Number of 4 X n 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, 910734015368035169, 6767355923137558997

Offset: 1

Author

R. H. Hardin, Apr 08 2018

Keywords

• nonn

Examples

			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
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 63

Crossrefs

Row 4 of A302472.

Formula

Empirical recurrence of order 63 (see link above).