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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. 1
2016, 5912192, 19855042560, 70577422755840, 258888921984516096, 968823452179344785408, 3676119951496408119115776, 14091184863095839321177456640, 54435471052008802940182132162560 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A183772(2n).
LINKS
EXAMPLE
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
CROSSREFS
Sequence in context: A223216 A110851 A282331 * A119517 A252334 A252327
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2011
STATUS
approved

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Last modified July 15 14:51 EDT 2024. Contains 374333 sequences. (Running on oeis4.)