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A051590
Number of oriented triangle graphs on binomial(n,2) points.
0
1, 2, 112, 8948032, 1601279890171392, 8048575239544313784372575680
OFFSET
2,2
REFERENCES
R. H. Jeurissen and Th. Bezembinder, Enumerating oriented triangle graphs, Ars Comb. 42(1996), 151-160
FORMULA
There is a formula for n <> 4 in the reference, too complicated to repeat here.
CROSSREFS
Sequence in context: A225333 A012525 A165975 * A091302 A209611 A042567
KEYWORD
nonn,more
AUTHOR
R. H. Jeurissen (jeuris(AT)sci.kun.nl)
STATUS
approved