A183768 1/32 the number of (2n+1) X 6 binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1.

2016, 5912192, 19855042560, 70577422755840, 258888921984516096, 968823452179344785408, 3676119951496408119115776, 14091184863095839321177456640, 54435471052008802940182132162560

Offset: 1

Author

R. H. Hardin, Jan 06 2011

Keywords

• nonn

Comments

Column 5 of A183772(2n).

Examples

			Some solutions for 3 X 6:
..0..0..0..1..0..1....0..1..1..1..1..1....1..1..0..0..0..1....1..0..0..0..1..0
..0..1..1..1..0..1....0..1..0..1..0..0....1..1..1..1..0..1....0..1..1..1..1..1
..1..1..1..0..0..1....0..0..1..0..0..0....0..0..1..0..1..1....0..0..0..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..65