A224119 Number of idempotent 5X5 0..n matrices of rank 3

2050, 20810, 103050, 368130, 1042030, 2563150, 5576290, 11164490, 20782910, 36563090, 61222530, 98646650, 153264230, 231266730, 339896070

Offset

1,1

Comments

Row 5 of A224118

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A123095 A174752 A045059 * A183842 A253711 A168176

Adjacent sequences: A224116 A224117 A224118 * A224120 A224121 A224122

Keyword

nonn

Author

R. H. Hardin Apr 09 2013

Status

approved