A203494 Number of 4Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns

3, 82, 3760, 173860, 8518564, 442135180, 24148894412

Offset

1,1

Comments

Row 4 of A203491

Links

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

Example

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

Crossrefs

Sequence in context: A055590 A037111 A067202 * A319836 A356503 A158995

Adjacent sequences: A203491 A203492 A203493 * A203495 A203496 A203497

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved