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A027607 Number of non-well-founded sets or hypersets (sets that can contain themselves) of level n (representable by graphs with n nodes). +0
1
2, 2, 16, 504, 52944 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Sequence in context: A012520 A012323 A009804 this_sequence A100680 A002567 A000528

Adjacent sequences: A027604 A027605 A027606 this_sequence A027608 A027609 A027610

KEYWORD

nonn

AUTHOR

Elaine Milito (emilito(AT)bird.wcupa.edu)

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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