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A222823 Number of idempotent 4X4 0..n matrices 0
452, 2052, 5584, 12476, 23568, 41668, 67136, 104112, 153604, 219728, 303468, 412720, 545012, 709272, 907828, 1146704, 1426212, 1759348, 2142176, 2590236, 3101848, 3686444, 4346808, 5102188, 5942936 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 4 of A222821
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..2....1..1..2..0....0..0..0..0....0..3..3..2....0..1..2..1
..0..0..3..0....0..0..0..0....2..1..3..0....0..0..0..0....0..1..1..0
..0..0..1..0....0..0..0..0....0..0..0..0....0..1..1..0....0..0..0..0
..0..0..0..1....0..0..3..1....2..0..2..1....0..0..0..1....0..0..1..1
CROSSREFS
Sequence in context: A224561 A116308 A183636 * A205209 A236665 A318627
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 09 2013
STATUS
approved

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Last modified July 21 03:50 EDT 2024. Contains 374463 sequences. (Running on oeis4.)