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A224120 Number of idempotent 6X6 0..n matrices of rank 4 0
12405, 260235, 2273505, 12775065, 52968495, 178881705, 514370175, 1311704565, 3033506835, 6484756785 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A224118

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A061731 A278892 A248084 * A233964 A156116 A068676

Adjacent sequences:  A224117 A224118 A224119 * A224121 A224122 A224123

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 09 2013

STATUS

approved

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Last modified May 24 04:25 EDT 2022. Contains 354005 sequences. (Running on oeis4.)