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A195765
Number of triangular nXnXn 0..3 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, 8472, 898125, 276763188
OFFSET
1,4
COMMENTS
Column 3 of A195768
EXAMPLE
Some solutions for n=6
.......1............1............1............1............1............1
......1.1..........0.2..........0.2..........1.1..........0.2..........2.0
.....1.2.0........2.0.1........1.2.0........3.0.0........0.2.1........1.0.2
....1.1.0.2......1.0.3.0......1.0.2.1......0.0.2.2......2.0.2.0......1.1.2.0
...1.0.2.1.1....1.2.0.1.1....2.1.1.0.1....0.2.1.1.1....2.1.1.0.1....0.2.0.1.2
..1.1.2.0.1.1..1.1.0.2.1.1..1.0.1.2.1.1..1.2.1.0.1.1..1.0.0.3.1.1..1.2.0.2.0.1
CROSSREFS
Sequence in context: A340336 A222686 A274271 * A195766 A195767 A195763
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 23 2011
STATUS
approved