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A203606 Number of nX4 0,1 arrays with adjacent row and column sums unequal 1
2, 44, 728, 10016, 129656, 1649668, 20742920, 256903112, 3151779352, 38451720324, 466959465212, 5648183965356, 68109502172416, 819331697005244, 9836181686366944, 117879822160978616, 1410647793481255432 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A203610

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..39

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A242856 A035605 A285746 * A009620 A001627 A202747

Adjacent sequences:  A203603 A203604 A203605 * A203607 A203608 A203609

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2012

STATUS

approved

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Last modified August 14 18:13 EDT 2022. Contains 356122 sequences. (Running on oeis4.)