A195803 Number of triangular nXnXn 0..6 arrays with all rows and diagonals having the same length having the same sum, with corners zero

1, 1, 7, 343, 12469, 5828215

Offset

1,3

Comments

Column 6 of A195805

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=5
......0..........0..........0..........0..........0..........0..........0
.....3.6........4.1........2.5........1.6........0.5........0.6........1.2
....1.4.0......3.5.1......5.0.3......1.4.0......1.1.1......2.2.2......0.2.0
...6.2.3.4....0.4.6.5....3.2.4.2....6.2.3.2....5.1.1.0....6.2.2.0....2.2.2.1
..0.3.2.5.0..0.5.2.0.0..0.4.1.5.0..0.1.2.5.0..0.0.1.5.0..0.0.2.6.0..0.1.0.2.0

Crossrefs

Sequence in context: A161582 A200967 A068150 * A263220 A145252 A154024

Adjacent sequences: A195800 A195801 A195802 * A195804 A195805 A195806

Keyword

nonn

Author

R. H. Hardin Sep 23 2011

Status

approved