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%I M2767 #13 Nov 07 2017 18:23:40
%S 3,8,178,129054,430903911398
%N Essentially n-ary operations in a certain 3-element algebra.
%D 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.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H J. Berman, <a href="/A007153/a007153.pdf">Free spectra of 3-element algebras</a>, R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983. (Annotated scanned copy)
%F a(n) = Sum_{i=0..n} (-1)^(n-i) * binomial(n, i) * A007156(i). - _Sean A. Irvine_, Nov 05 2017
%Y Cf. A007156.
%K nonn
%O 0,1
%A _N. J. A. Sloane_.
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