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A067212 Number of n X n 0..4 matrices with all row and column sums equal. 1
5, 25, 1001, 790425, 11991502235, 3632894572698505, 22823286475857170293275, 3059096488092534208632573065881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

..4..4..3....2..1..1....2..1..1....4..0..4....1..2..4....3..2..2....3..2..1

..4..3..4....1..3..0....2..0..2....0..4..4....2..3..2....2..1..4....0..3..3

..3..4..4....1..0..3....0..3..1....4..4..0....4..2..1....2..4..1....3..1..2

CROSSREFS

Row 4 of A202784.

Sequence in context: A279835 A169652 A137114 * A061583 A278120 A039780

Adjacent sequences:  A067209 A067210 A067211 * A067213 A067214 A067215

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2002

EXTENSIONS

Added one term and example - R. H. Hardin, Jan 05 2012

a(7)-a(8) from Andrew Howroyd, Jun 01 2017

STATUS

approved

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Last modified July 26 09:58 EDT 2021. Contains 346294 sequences. (Running on oeis4.)