A202978 Number of n X 7 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

1, 69, 3507, 122468, 4590696, 170937904, 6330398606, 235362503738, 8754859878268, 325475861455984, 12099539397621289, 449821095241853452, 16722911203146960563, 621702975576594657954, 23112884157721171287549

Offset: 1

Author

R. H. Hardin, Dec 26 2011

Keywords

• nonn

Comments

Column 7 of A202979.

Examples

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

Links

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

Crossrefs

Cf. A202979.