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A007157 Essentially n-ary operations in a certain 3-element algebra.
(Formerly M3695)
+0
1
0, 4, 74, 43682, 160297810086 (list; graph; listen)
OFFSET

0,2

REFERENCES

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

J. Berman, ``Free spectra of 3-element algebras,'' in R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983.

CROSSREFS

Sequence in context: A108808 A139112 A100865 this_sequence A000857 A046057 A072373

Adjacent sequences: A007154 A007155 A007156 this_sequence A007158 A007159 A007160

KEYWORD

nonn

AUTHOR

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

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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