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A184461
Half the number of (n+1) X 4 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks.
3
26, 244, 3090, 42874, 616534, 9016218, 133687638, 2002023718, 30215911640, 458822048550, 7001737409868, 107286031628502, 1649589497350886, 25437988001627234, 393268526198504728, 6093317202558667778
OFFSET
1,1
COMMENTS
Column 3 of A184467.
LINKS
EXAMPLE
Some solutions for 3 X 4
..0..1..1..1....0..1..1..1....0..0..1..0....0..0..1..1....0..0..1..0
..0..0..0..1....1..0..0..1....1..1..1..0....1..0..1..0....0..1..0..1
..0..1..1..1....1..1..0..0....0..0..0..0....1..1..0..0....1..0..1..1
...
...M..E..P.......E..E..P.......E..P..E.......M..E..P.......M..E..E...
...M..E..P.......P..M..M.......E..E..M.......P..E..M.......E..E..P...
CROSSREFS
Cf. A184467.
Sequence in context: A245873 A275880 A020537 * A088889 A348490 A060105
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2011
STATUS
approved