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A213989 Number of n X n 0..7 matrices whose square is also a 0..7 matrix 0
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
Sequence in context: A203699 A003009 A037122 * A181748 A118840 A111816
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 30 2012
STATUS
approved

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Last modified July 22 17:20 EDT 2024. Contains 374540 sequences. (Running on oeis4.)