A232320 Number of (4+1)X(n+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero.

34, 551, 10409, 231454, 5142441, 113293694, 2499669158, 55147236337, 1216656297612, 26841719357568, 592179351445235, 13064599837184618, 288229857559634498, 6358897503996161509, 140289343114550595132

Offset: 1

Author

R. H. Hardin, Nov 22 2013

Keywords

• nonn

Comments

Row 4 of A232316

Examples

			Some.solutions.for.n=3
..0..0..0..0....0..0..1..0....0..0..0..0....0..0..1..1....0..0..0..1
..0..1..0..0....0..1..0..0....1..1..1..1....0..0..1..1....0..0..1..0
..1..0..0..0....1..0..0..1....1..1..1..0....0..1..1..0....0..1..0..0
..1..1..1..1....0..1..1..0....0..0..0..1....1..0..0..1....1..1..0..1
..1..1..1..1....1..0..0..0....1..1..1..1....0..0..1..1....1..0..1..1
		

Links

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

Formula

Empirical recurrence of order 78 (see link above)