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A222823
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Number of idempotent 4X4 0..n matrices
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0
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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
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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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
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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