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A102599
Number of n-node unlabeled connected oriented graphs whose underlying graphs are mating graphs, cf. A006024.
2
1, 1, 2, 16, 284, 12717, 1468870
OFFSET
1,3
CROSSREFS
Sequence in context: A009764 A189257 A227674 * A123744 A136796 A055546
KEYWORD
more,nonn
AUTHOR
Goran Kilibarda, Zoran Maksimovic, Vladeta Jovovic, Jan 22 2005
STATUS
approved