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A203494 Number of 4Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns 0
3, 82, 3760, 173860, 8518564, 442135180, 24148894412 (list; graph; refs; listen; history; text; internal format)
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 A158995 A079652

Adjacent sequences:  A203491 A203492 A203493 * A203495 A203496 A203497

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2012

STATUS

approved

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Last modified February 18 04:48 EST 2020. Contains 332011 sequences. (Running on oeis4.)