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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A184467

LINKS

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

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

Adjacent sequences:  A184456 A184457 A184458 * A184460 A184461 A184462

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2011

STATUS

approved

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Last modified September 25 21:07 EDT 2020. Contains 337344 sequences. (Running on oeis4.)