A203495 Number of 5Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns

3, 256, 25002, 3065704, 421158558, 61706303456, 9532999874792

Offset

1,1

Comments

Row 5 of A203491

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A045824 A027860 A059947 * A051490 A232545 A177748

Adjacent sequences: A203492 A203493 A203494 * A203496 A203497 A203498

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved