A202737 Number of nX3 0..1 arrays with row sums equal and column sums unequal to adjacent columns

2, 6, 38, 86, 282, 1074, 2802, 8694, 30170, 82286, 251682, 837026, 2336882, 7101030, 23060898, 65306934, 197740602, 632536014, 1808535522, 5464051326, 17297449410, 49797577110, 150233445162, 471996750978, 1365869873682, 4116478752054

Offset

1,1

Comments

Column 3 of A202742

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..1..1....1..1..0....1..0..1....0..0..1....0..1..1....1..1..0....0..0..1
..0..1..1....0..1..1....0..1..1....0..0..1....1..1..0....1..1..0....0..0..1
..1..1..0....1..1..0....1..0..1....0..0..1....0..1..1....0..1..1....1..0..0
..0..1..1....1..1..0....1..0..1....0..1..0....1..1..0....0..1..1....0..0..1
..1..1..0....0..1..1....1..1..0....0..0..1....1..0..1....0..1..1....1..0..0

Crossrefs

Sequence in context: A113375 A117266 A259437 * A186648 A372309 A013033

Adjacent sequences: A202734 A202735 A202736 * A202738 A202739 A202740

Keyword

nonn

Author

R. H. Hardin Dec 23 2011

Status

approved