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A183766 1/32 the number of (2n+1)X4 binary arrays with equal numbers of 2X2 subblocks with sum mod two being 0 and 1 1
40, 7392, 1555840, 346131968, 79420170240, 18585877094400, 4409408507412480, 1056689477487820800, 255189244398549336064, 62004700939478066266112, 15140238779254079729172480, 3712064235466595220724908032 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A183772(2n)

LINKS

Ron Hardin, Table of n, a(n) for n = 1..100

EXAMPLE

Some solutions for 3X4

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

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

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

CROSSREFS

Sequence in context: A196855 A196949 A201624 * A184892 A119525 A123381

Adjacent sequences:  A183763 A183764 A183765 * A183767 A183768 A183769

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2011

STATUS

approved

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Last modified May 22 13:19 EDT 2013. Contains 225548 sequences.