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A202738 Number of nX4 0..1 arrays with row sums equal and column sums unequal to adjacent columns 1
2, 22, 140, 838, 5092, 29680, 183220, 1061814, 6630116, 39048472, 242647660, 1438692856, 8910239756, 53090781836, 327214611580, 1954347351734, 11998820896676, 71771002591048, 439163289580348, 2629051988484048 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A202742

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..74

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A244719 A084399 A067057 * A286778 A232977 A282819

Adjacent sequences:  A202735 A202736 A202737 * A202739 A202740 A202741

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 23 2011

STATUS

approved

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Last modified April 21 20:03 EDT 2019. Contains 322328 sequences. (Running on oeis4.)