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A224527 Number of idempotent 5X5 0..n matrices of rank 1 0
405, 2155, 5845, 13525, 24575, 44545, 69195, 107925, 156505, 223355, 301605, 413755, 535845, 694695, 882245 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A224524

LINKS

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

EXAMPLE

Some solutions for n=3

..0..0..0..0..0....0..3..0..2..1....0..0..0..0..0....0..0..0..0..0

..0..0..0..0..0....0..0..0..0..0....3..1..1..1..3....1..0..0..0..1

..2..3..0..1..3....0..3..0..2..1....0..0..0..0..0....2..0..0..0..2

..2..3..0..1..3....0..0..0..0..0....0..0..0..0..0....3..0..0..0..3

..0..0..0..0..0....0..3..0..2..1....0..0..0..0..0....1..0..0..0..1

CROSSREFS

Sequence in context: A267893 A151745 A204636 * A219147 A239541 A187134

Adjacent sequences:  A224524 A224525 A224526 * A224528 A224529 A224530

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 09 2013

STATUS

approved

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Last modified January 16 13:05 EST 2022. Contains 350376 sequences. (Running on oeis4.)