login
A184459
Half the number of (n+1)X2 binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks
1
3, 7, 26, 91, 334, 1212, 4496, 16809, 63442, 240728, 918208, 3516450, 13515164, 52099024, 201356496, 779967713, 3027239338, 11769964920, 45833102224, 178726147558, 697817190692, 2727647007504, 10672911447056, 41801025679450
OFFSET
1,1
COMMENTS
Column 1 of A184467
LINKS
EXAMPLE
All solutions for 3X2
..0..0....0..0....0..0....0..1....0..1....0..1....0..1
..1..1....0..1....1..0....1..0....1..0....0..1....0..1
..0..0....1..1....1..1....1..0....0..1....1..0....0..1
...
...E.......M.......M.......E.......E.......E.......E...
...E.......P.......P.......E.......E.......E.......E...
CROSSREFS
Sequence in context: A148741 A328280 A258311 * A215018 A069738 A057005
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2011
STATUS
approved