A183319 Number of n X 7 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

34, 250, 3305, 31428, 343035, 3437801, 35629548, 360327392, 3674032121, 37171418048, 376812203313, 3809267878552, 38525903428706, 389213738128583, 3932484616050161, 39713438364928384, 401069370226611064, 4049515179562143177, 40887644784074526836, 412792720508937690701

Offset: 1

Author

R. H. Hardin, Jan 03 2011

Keywords

• nonn

Examples

			Some solutions for 5 X 7:
..0..0..1..1..0..0..0....0..1..1..0..0..0..0....1..1..0..0..0..0..0
..1..1..1..1..0..0..0....0..1..1..0..0..0..0....1..1..0..1..1..0..0
..1..1..1..1..0..0..1....1..1..0..0..0..1..1....0..0..0..1..1..0..0
..0..0..1..1..1..1..1....1..1..0..0..1..1..1....1..1..0..0..0..0..0
..1..1..0..0..1..1..0....0..0..0..1..1..0..1....1..1..0..1..1..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200

Crossrefs

Column 7 of A183322.