A213994 Number of 5X5 0..n matrices whose square is also a 0..n matrix.

474286, 35799856, 421195466, 5018010431, 22406574462, 124477495732, 361204218672, 1222761036532, 3390266359632

Offset

1,1

Comments

Row 5 of A213990

Links

Table of n, a(n) for n=1..9.

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: A219996 A183659 A388023 * A391071 A201226 A244628

Adjacent sequences: A213991 A213992 A213993 * A213995 A213996 A213997

Keyword

nonn

Author

R. H. Hardin, Jun 30 2012

Status

approved