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A109458 Number of inequivalent Krom functions on n variables (or 2SAT instances) under permutations of variables. +0
2
2, 4, 12, 48, 308, 3028, 49490, 1350894, 62154403 (list; graph; listen)
OFFSET

0,1
CROSSREFS

See A109457 for definitions and references.

Sequence in context: A030801 A082480 A093934 this_sequence A030963 A030879 A030940

Adjacent sequences: A109455 A109456 A109457 this_sequence A109459 A109460 A109461

KEYWORD

nonn,hard

AUTHOR

D. E. Knuth, Aug 24 2005

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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