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A007159
Essentially n-ary operations in a certain 3-element algebra.
(Formerly M2767)
0
3, 8, 178, 129054, 430903911398
OFFSET
0,1
REFERENCES
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.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
J. Berman, Free spectra of 3-element algebras, R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983. (Annotated scanned copy)
FORMULA
a(n) = Sum_{i=0..n} (-1)^(n-i) * binomial(n, i) * A007156(i). - Sean A. Irvine, Nov 05 2017
CROSSREFS
Cf. A007156.
Sequence in context: A076147 A132563 A065061 * A081466 A092592 A162185
KEYWORD
nonn
AUTHOR
STATUS
approved