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A109459 Number of inequivalent Krom functions on n variables (or 2SAT instances) under permuting and complementing variables. 1
2, 3, 6, 14, 45, 196, 1360, 15631 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

CROSSREFS

See A109457 for definitions and references.

Sequence in context: A056569 A094468 A091285 * A118986 A091138 A090983

Adjacent sequences:  A109456 A109457 A109458 * A109460 A109461 A109462

KEYWORD

nonn,hard

AUTHOR

D. E. Knuth, Aug 24 2005

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Last modified February 16 07:32 EST 2012. Contains 205874 sequences.