A213994 - OEIS

%I #3 Jun 30 2012 11:57:33

%S 474286,35799856,421195466,5018010431,22406574462,124477495732,

%T 361204218672,1222761036532,3390266359632

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

%C Row 5 of A213990

%e Some solutions for n=3

%e ..0..2..1..0..1....0..1..1..0..3....1..1..3..2..0....0..0..3..0..0

%e ..0..0..0..1..0....0..0..1..0..0....0..0..0..1..3....0..1..1..3..3

%e ..0..1..0..1..0....0..2..0..1..1....0..0..0..0..0....0..0..0..0..0

%e ..0..0..1..0..0....0..0..1..0..0....1..0..0..0..0....1..0..0..0..0

%e ..0..0..0..0..0....0..0..0..0..0....0..0..0..1..1....0..0..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 30 2012