A203488 Number of n X 5 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

48, 3348, 170868, 8518564, 421158558, 20726134056, 1022868051652, 50561285393908, 2503295874466950, 124208845614214498, 6167894219771885242, 306989800251437858776, 15307714522320704176494, 764702726505274412235480

Offset

1,1

Comments

Column 5 of A203491.

Links

Table of n, a(n) for n=1..14.

Example

Some solutions for n=5
..0..0..2..0..0....1..0..2..2..0....2..0..2..2..0....1..0..0..0..0
..0..0..1..1..0....2..2..1..0..0....1..0..1..2..2....1..0..0..0..0
..0..1..0..0..1....2..1..2..0..0....0..2..0..2..2....1..0..0..0..0
..0..1..0..1..0....1..0..1..1..2....1..1..0..2..2....0..0..0..0..1
..1..0..1..0..0....1..2..2..0..0....0..2..0..2..2....0..0..1..0..0

Crossrefs

Cf. A203491.

Sequence in context: A375294 A235903 A208442 * A162700 A027567 A271188

Adjacent sequences: A203485 A203486 A203487 * A203489 A203490 A203491

Keyword

nonn

Author

R. H. Hardin, Jan 02 2012

Status

approved