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A112650 Number of truth tables generated by (n-1)-CNF boolean expressions of n variables. 1
10, 166, 43146, 2805252934 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Conjunctive Normal Form (CNF) is a conjunction of disjunctions. k-CNF limits each disjunctive clause to k variables and their complements.

LINKS

Table of n, a(n) for n=2..5.

C. B. Barber, ttcnf 2005.1 (April 2005).

C. B. Barber, www.qhull.org/ttcnf.

EXAMPLE

E.g. The 1-CNF expressions of 2 variables are: a, -a, b, -b, a and b, a and -b, -a and b, -a and -b, a and -a, true. Their truth tables are: 0xC, 0x3, 0xA, 0x5, 0x8, 0x4, 0x2, 0x1, 0x0, 0xF.

CROSSREFS

Cf. A109457, A112535.

Sequence in context: A064747 A054688 A229228 * A006295 A006297 A099711

Adjacent sequences:  A112647 A112648 A112649 * A112651 A112652 A112653

KEYWORD

more,nonn

AUTHOR

Brad Barber (bradb(AT)shore.net), Dec 27 2005

STATUS

approved

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Last modified November 26 18:07 EST 2014. Contains 250083 sequences.