A195797 Number of triangular nXnXn 0..n arrays with all rows and diagonals having the same length having the same sum, with corners zero.

1, 1, 4, 125, 5052, 5828215, 479534519840

Offset: 1

Author

R. H. Hardin Sep 23 2011

Keywords

• nonn

Comments

Diagonal of A195805

Examples

			Some solutions for n=5
......0..........0..........0..........0..........0..........0..........0
.....0.1........5.0........5.0........4.3........5.0........1.0........3.2
....4.4.3......5.0.5......3.0.5......4.0.3......3.0.4......3.1.3......5.1.5
...1.2.3.1....0.0.0.5....0.4.2.3....2.1.2.4....0.2.1.4....0.1.1.1....1.4.4.2
..0.0.5.0.0..0.5.5.0.0..0.5.1.2.0..0.5.2.3.0..0.5.2.1.0..0.1.3.0.0..0.4.2.3.0