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A195766
Number of triangular nXnXn 0..4 arrays with all row sums equal to the length of the row and all diagonal sums equal to the length of the respective diagonal
0
1, 1, 1, 3, 18, 228, 8904, 1037343, 374504433
OFFSET
1,4
COMMENTS
Column 4 of A195768
EXAMPLE
Some solutions for n=6
.......1............1............1............1............1............1
......2.0..........0.2..........0.2..........1.1..........1.1..........2.0
.....0.3.0........1.1.1........1.2.0........1.2.0........1.2.0........1.1.1
....2.0.0.2......1.1.2.0......1.1.1.1......0.1.2.1......0.2.1.1......0.3.0.1
...0.0.3.0.2....2.1.0.1.1....2.0.1.1.1....2.1.0.0.2....2.0.0.1.2....1.0.0.2.2
..1.2.1.1.0.1..1.0.1.2.1.1..1.0.2.1.1.1..1.0.2.2.0.1..1.0.3.1.0.1..1.1.3.0.0.1
CROSSREFS
Sequence in context: A222686 A274271 A195765 * A195767 A195763 A265460
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 23 2011
STATUS
approved