A222824 Number of idempotent 5X5 0..n matrices

5682, 54182, 248442, 855192, 2319872, 5617912, 11946912, 23683432, 43615442, 76232022, 126661082, 203564942, 314635222, 473400002, 693921022

Offset

1,1

Comments

Row 5 of A222821

Links

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

Example

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

Crossrefs

Sequence in context: A224682 A224690 A224683 * A183638 A192098 A287239

Adjacent sequences: A222821 A222822 A222823 * A222825 A222826 A222827

Keyword

nonn

Author

R. H. Hardin Apr 09 2013

Status

approved