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A079179 Number of anti-associative closed binary operations on a set of order n. 7
1, 2, 52, 421560 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

A079176(n)+A079179(n)=A002489(n).

Each a(n) is equal to the sum of the products of each element in row n of A079181 and the corresponding element of A079210.

LINKS

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

Index entries for sequences related to groupoids

CROSSREFS

Cf. A079176, A079180, A079181.

Sequence in context: A121293 A057106 A080973 * A000654 A061306 A179616

Adjacent sequences:  A079176 A079177 A079178 * A079180 A079181 A079182

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 04:58 EST 2012. Contains 205985 sequences.