A213958 Number of n X n 0..4 matrices with row and column i=1..n having sum <= i*4

5, 275, 199735, 1839121115, 214090209950060, 314911377440218697950, 5858129386840205449108592935

Offset

1,1

Comments

Column 4 of A213962

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A036213 A262548 A112901 * A158115 A260197 A225781

Adjacent sequences: A213955 A213956 A213957 * A213959 A213960 A213961

Keyword

nonn

Author

R. H. Hardin Jun 28 2012

Status

approved