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A005978
Number of dependable interval graphs with n nodes.
(Formerly M3554)
0
0, 0, 0, 0, 1, 4, 19, 93, 539, 3474, 24856, 192972, 1613219, 14410374, 136920388, 1378542639, 14663082556, 164340455701, 1936286904952, 23932267735948, 309701296575063
OFFSET
1,6
REFERENCES
P. J. Hanlon, personal communication.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Phil Hanlon, Counting interval graphs, Trans. Amer. Math. Soc. 272 (1982), no. 2, 383-426.
CROSSREFS
Sequence in context: A275751 A131552 A122369 * A083065 A137636 A027618
KEYWORD
nonn
AUTHOR
STATUS
approved