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A203563 Number of nX7 0..2 arrays with row sums equal and column sums equal 0
3, 395, 35619, 7343451, 1509893003, 360255871643 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A203564

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

..0..1..2..0..1..1..2....0..2..1..1..1..0..2....0..2..0..1..2..0..2

..2..1..0..1..1..2..0....0..0..0..1..2..2..2....1..0..0..2..2..1..1

..0..1..2..2..1..0..1....2..1..2..1..0..1..0....1..2..2..1..0..1..0

..2..1..0..1..1..1..1....2..1..1..1..1..1..0....2..0..2..0..0..2..1

CROSSREFS

Sequence in context: A244670 A199146 A137023 * A181990 A198666 A330014

Adjacent sequences:  A203560 A203561 A203562 * A203564 A203565 A203566

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2012

STATUS

approved

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Last modified October 21 14:42 EDT 2021. Contains 348155 sequences. (Running on oeis4.)