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A202745 Number of 4Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns 0
2, 10, 86, 838, 6870, 62398, 613950, 6018166, 59293518, 601267870, 6215708078, 64727555230, 679456522670, 7200537529326, 76879249259246, 825573117666246, 8913831877350462, 96733061472889806, 1054372579551732366 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A202742

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Sequence in context: A156466 A304403 A132397 * A208833 A145082 A335501

Adjacent sequences:  A202742 A202743 A202744 * A202746 A202747 A202748

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 23 2011

STATUS

approved

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)