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A224116 Number of idempotent 5X5 0..n matrices of rank 2 0
3070, 30410, 136990, 467290, 1240310, 2986210, 6260470, 12345410, 22576030, 39299170, 64929590, 104218930, 160450990, 240932330, 352487350 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A224114

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

..0..0..0..0..0....0..0..0..0..0....0..0..0..1..0....0..0..0..0..0

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

CROSSREFS

Sequence in context: A274410 A274411 A224970 * A183726 A137485 A251786

Adjacent sequences:  A224113 A224114 A224115 * A224117 A224118 A224119

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 09 2013

STATUS

approved

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Last modified October 23 14:54 EDT 2019. Contains 328345 sequences. (Running on oeis4.)