A195801 Number of triangular nXnXn 0..4 arrays with all rows and diagonals having the same length having the same sum, with corners zero

1, 1, 5, 125, 1759, 213319

Offset

1,3

Comments

Column 4 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
.....2.2........3.0........1.3........4.2........4.2........2.1........0.2
....2.2.0......1.3.1......0.1.0......0.3.2......0.3.3......2.2.0......3.4.2
...1.1.3.3....0.3.3.3....3.1.1.1....3.4.2.3....4.3.0.3....0.1.3.3....2.2.3.1
..0.3.1.1.0..0.3.1.0.0..0.1.0.3.0..0.3.1.3.0..0.2.3.3.0..0.3.1.0.0..0.0.4.1.0

Crossrefs

Sequence in context: A195949 A354654 A067081 * A154022 A013710 A202628

Adjacent sequences: A195798 A195799 A195800 * A195802 A195803 A195804

Keyword

nonn

Author

R. H. Hardin Sep 23 2011

Status

approved