A213986 - OEIS

A213986

Number of n X n 0..4 matrices whose square is also a 0..4 matrix

3, 72, 8168, 3510112, 5018010431

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A213990

LINKS

EXAMPLE

Some solutions for n=3

..0..4..1....0..4..4....0..4..4....2..0..0....1..0..2....0..3..2....2..2..0

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved