A202738 Number of nX4 0..1 arrays with row sums equal and column sums unequal to adjacent columns

2, 22, 140, 838, 5092, 29680, 183220, 1061814, 6630116, 39048472, 242647660, 1438692856, 8910239756, 53090781836, 327214611580, 1954347351734, 11998820896676, 71771002591048, 439163289580348, 2629051988484048

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 * A082940 A286778 A232977

Adjacent sequences: A202735 A202736 A202737 * A202739 A202740 A202741

Keyword

nonn

Author

R. H. Hardin Dec 23 2011

Status

approved