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A007154 Spectrum of the free Kleene algebra on n free variables.
(Formerly M3703)
1
0, 4, 82, 43916, 160297985274 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

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: A158981 A317889 A291371 * A056410 A056400 A248382

Adjacent sequences:  A007151 A007152 A007153 * A007155 A007156 A007157

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Title improved by Sean A. Irvine, Nov 04 2017

STATUS

approved

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Last modified October 3 04:21 EDT 2022. Contains 357230 sequences. (Running on oeis4.)