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Search: id:A134957
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A134957 Number of hyperforests with n unlabeled vertices: analogue of A134955 when edges of size 1 are allowed (with no two equal edges). +0
2
1, 2, 6, 20, 75, 310, 1422 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A150167 A150168 A145870 this_sequence A052889 A150169 A083691

Adjacent sequences: A134954 A134955 A134956 this_sequence A134958 A134959 A134960

KEYWORD

nonn

AUTHOR

D. E. Knuth, Jan 26 2008

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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