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A283841
Number of ternary maps f : S X S X S -> S on a set S of n elements which can be represented as a superposition of binary maps * : S X S -> S (Version 2).
1
OFFSET
1,2
COMMENTS
That is, the number of ternary maps represented either in the form f(x, y, z) = (x ∗ y) ∗ z or in the form f(x, y, z) = x ∗ (y ∗ z).
LINKS
Pasha Zusmanovich, Lie algebras and around: selected questions, arXiv:1608.05863 [math.RA], 2016.
CROSSREFS
Cf. A283840.
Sequence in context: A299035 A189648 A351804 * A100414 A189310 A068735
KEYWORD
nonn,bref,more
AUTHOR
N. J. A. Sloane, Mar 25 2017
STATUS
approved