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A184458 Half the number of (n+1)X(n+1) binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks 0
3, 35, 3090, 1181303, 1925704384, 13061240432092, 364710845961492808, 41619801566809753837565, 19314484317434151178477352552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A184467

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for 3X3

..0..0..0....0..1..0....0..0..0....0..1..0....0..0..1....0..1..1....0..1..0

..1..1..0....1..0..1....1..0..1....0..1..0....0..1..1....1..0..1....1..0..1

..0..1..0....0..1..0....1..1..1....0..1..0....1..0..0....1..0..0....1..0..1

...

...E..M.......E..E.......M..M.......E..E.......M..P.......E..P.......E..E...

...P..E.......E..E.......P..P.......E..E.......E..E.......E..M.......E..E...

CROSSREFS

Sequence in context: A125530 A068726 A093583 * A132940 A132941 A068002

Adjacent sequences:  A184455 A184456 A184457 * A184459 A184460 A184461

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2011

STATUS

approved

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Last modified April 17 14:42 EDT 2014. Contains 240646 sequences.