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%I #6 Mar 30 2012 16:52:02
%S 1,1,2,6,17,57,191,678,2443,9029
%N Number of association types of a binary-ternary algebra with a commutative binary operation.
%D Bremner, Murray R.; and Hentzel, Irvin R.; Identities relating the Jordan product and the associator in the free nonassociative algebra. J. Algebra Appl. 5 (2006), 77-88.
%F The reference gives a recurrence.
%Y Cf. A190916.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, May 23 2011