A302732 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 421, 4064, 3316, 17828, 104969, 532511, 1932168, 7608792, 40495097, 193959222, 806044112, 3571553560, 16732139668, 77717205902, 345532208087, 1548242747664, 7108827463856, 32520170426142, 146833013273650, 664181788383321

Offset: 1

Author

R. H. Hardin, Apr 12 2018

Keywords

• nonn

Comments

Row 7 of A302728.

Examples

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

Links

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

Crossrefs

Cf. A302728.