A213959 Number of n X n 0..5 matrices with row and column i=1..n having sum <= i*5

6, 546, 909900, 26346319032, 13186531254708756, 113762889909962601897876

Offset

1,1

Comments

Column 5 of A213962

Links

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

Example

Some solutions for n=4
..4..0..0..0....3..0..0..0....4..0..0..0....3..0..2..0....3..0..0..2
..0..3..3..0....0..4..5..0....0..2..5..2....1..0..3..3....2..5..0..2
..0..4..3..0....0..5..5..3....1..5..4..4....0..2..4..5....0..0..1..2
..0..3..0..0....0..0..1..5....0..0..4..4....0..0..2..3....0..5..4..0

Crossrefs

Sequence in context: A159531 A276490 A223097 * A358487 A341871 A226263

Adjacent sequences: A213956 A213957 A213958 * A213960 A213961 A213962

Keyword

nonn

Author

R. H. Hardin Jun 28 2012

Status

approved