A214010 Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i*6

7, 1372, 9976732, 2747459653062, 29476753771054668510

Offset

1,1

Comments

Column 6 of A214011

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=3
..0..4..0....0..3..0....0..0..0....0..3..0....0..1..0....0..1..4....3..0..0
..0..0..0....3..3..0....2..3..4....0..0..7....2..0..0....6..0..0....0..9..0
..4..0..0....0..5..4....0..1..0....0..0.10....0..1..1....0..5..5....0..0..5

Crossrefs

Sequence in context: A152518 A210396 A289482 * A145451 A144676 A243232

Adjacent sequences: A214007 A214008 A214009 * A214011 A214012 A214013

Keyword

nonn

Author

R. H. Hardin Jun 30 2012

Status

approved