A213992 Number of 3X3 0..n matrices whose square is also a 0..n matrix.

172, 1003, 2546, 8168, 14030, 28328, 40370, 64679, 102377, 151301, 191708, 290679, 356931, 445149, 569583, 787170, 917169, 1190970, 1375176, 1744554, 2061684, 2413461, 2647641, 3323763, 3962721, 4502277, 5124586, 6087406, 6704266, 7973326

Offset: 1

Author

R. H. Hardin Jun 30 2012

Keywords

• nonn

Comments

Row 3 of A213990

Examples

			Some solutions for n=3
..0..0..2....1..2..1....0..3..0....0..2..1....0..1..3....1..1..0....0..1..0
..0..1..1....0..0..0....0..1..1....0..0..0....0..0..1....0..0..3....0..1..0
..0..1..1....1..0..0....0..2..0....0..0..1....0..0..0....0..0..0....0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210