A213989 - OEIS

A213989

Number of n X n 0..7 matrices whose square is also a 0..7 matrix

3, 148, 40370, 56599992, 361204218672

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

OFFSET

1,1

COMMENTS

Column 7 of A213990

LINKS

EXAMPLE

Some.solutions.for.n=3

..0..1..7....0..5..3....0..2..1....0..1..7....0..2..5....2..0..0....0..7..0

..0..0..5....0..0..0....0..0..0....0..0..2....0..0..0....0..1..1....0..1..0

..0..0..0....0..0..0....0..3..2....0..0..0....0..0..1....0..0..1....0..6..0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved