A265090 Number of 4Xn arrays containing n copies of 0..4-1 with row sums equal and column sums equal.

0, 24, 0, 4464, 0, 2850360, 0, 2645541360, 0, 2890115427024, 0, 3487466070335016, 0, 4506154929610407216, 0, 6121513933821142187760, 0

Offset

1,2

Comments

Row 4 of A265089.

Links

Table of n, a(n) for n=1..17.

Example

Some solutions for n=4
..1..3..2..0....0..2..3..1....3..2..1..0....3..0..3..0....0..1..2..3
..2..0..3..1....0..1..2..3....0..1..3..2....1..2..1..2....3..2..1..0
..3..1..0..2....3..2..1..0....1..0..2..3....2..1..0..3....2..0..3..1
..0..2..1..3....3..1..0..2....2..3..0..1....0..3..2..1....1..3..0..2

Crossrefs

Cf. A265089.

Sequence in context: A340135 A364203 A308304 * A174560 A267427 A040581

Adjacent sequences: A265087 A265088 A265089 * A265091 A265092 A265093

Keyword

nonn

Author

R. H. Hardin, Dec 01 2015

Status

approved