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A007156 Spectrum of a certain 3-element algebra.
(Formerly M2914)
1
3, 11, 197, 129615, 430904428717 (list; graph; refs; listen; history; text; internal format)
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

Table of n, a(n) for n=0..4.

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)

CROSSREFS

Sequence in context: A081484 A125738 A092840 * A289170 A060346 A145988

Adjacent sequences:  A007153 A007154 A007155 * A007157 A007158 A007159

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 11 22:31 EST 2019. Contains 329046 sequences. (Running on oeis4.)