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 A213994 Number of 5X5 0..n matrices whose square is also a 0..n matrix 0
 474286, 35799856, 421195466, 5018010431, 22406574462, 124477495732, 361204218672, 1222761036532, 3390266359632 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 5 of A213990 LINKS EXAMPLE Some solutions for n=3 ..0..2..1..0..1....0..1..1..0..3....1..1..3..2..0....0..0..3..0..0 ..0..0..0..1..0....0..0..1..0..0....0..0..0..1..3....0..1..1..3..3 ..0..1..0..1..0....0..2..0..1..1....0..0..0..0..0....0..0..0..0..0 ..0..0..1..0..0....0..0..1..0..0....1..0..0..0..0....1..0..0..0..0 ..0..0..0..0..0....0..0..0..0..0....0..0..0..1..1....0..0..0..0..0 CROSSREFS Sequence in context: A228271 A219996 A183659 * A201226 A244628 A290050 Adjacent sequences:  A213991 A213992 A213993 * A213995 A213996 A213997 KEYWORD nonn AUTHOR R. H. Hardin Jun 30 2012 STATUS approved

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Last modified August 7 17:38 EDT 2020. Contains 336278 sequences. (Running on oeis4.)