A079176 Number of non-anti-associative closed binary operations on a set of order n.

1, 14, 19631, 4294545736

Offset

1,2

Comments

Each a(n) is equal to the sum of the products of each element in row n of A079178 and the corresponding element of A079210.

Links

Table of n, a(n) for n=1..4.

C. van den Bosch, Closed binary operations on small sets

Index entries for sequences related to groupoids

Formula

a(n) = A002489(n) - A079179(n).

Crossrefs

Cf. A079177, A079178, A079179.

Sequence in context: A104376 A053870 A283840 * A344668 A013754 A073940

Adjacent sequences: A079173 A079174 A079175 * A079177 A079178 A079179

Keyword

nonn

Author

Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003

Status

approved