A202787 Number of 5 X 5 0..n arrays with row and column sums equal.

1, 4322, 2577513, 290838284, 11991502235, 255657603186, 3430832678207, 32701809796548, 239657412990669, 1426274971770170, 7169135482380621, 31335724079805792, 121778484808846083, 428134536074377254, 1380524064964529355, 4128449284755670956

Offset

0,2

Links

Table of n, a(n) for n=0..15.

Example

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

Crossrefs

Row 5 of A202784.

Sequence in context: A008409 A320729 A233641 * A028384 A107542 A300359

Adjacent sequences: A202784 A202785 A202786 * A202788 A202789 A202790

Keyword

nonn

Author

R. H. Hardin, Dec 24 2011

Extensions

a(0)=1 prepended and a(9)-a(15) from Andrew Howroyd, May 11 2020

Status

approved