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A003218 Weights of threshold functions.
(Formerly M0719)
+0
1
1, 2, 3, 5, 9, 18, 42 (list; graph; listen)
OFFSET

2,2

REFERENCES

S. Muroga, Threshold Logic and Its Applications. Wiley, NY, 1971, p. 268.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

S. Plouffe, Approximations de S\'{e}ries G\'{e}n\'{e}ratrices et Quelques Conjectures, Dissertation, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.

S. Plouffe, 1031 Generating Functions and Conjectures, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.

MAPLE

A003218:=-(1-4*z+2*z**3)/(-1+6*z-9*z**2+3*z**3); [Conjectured by S. Plouffe in his 1992 dissertation.]

CROSSREFS

Sequence in context: A099236 A130581 A051236 this_sequence A058770 A049910 A077643

Adjacent sequences: A003215 A003216 A003217 this_sequence A003219 A003220 A003221

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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