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A079245 Number of isomorphism classes of associative commutative non-anti-associative non-anti-commutative closed binary operations on a set of order n. 9
0, 3, 12, 58 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A079231(n)+A079233(n)+A079235(n)+A079237(n)+A079196(n)+A079241(n)+A079243(n)+A079245(n)+A063524(n)=A002489(n)

Each a(n) is equal to the sum of the elements in row n of A079209.

LINKS

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

Index entries for sequences related to semigroups

CROSSREFS

Cf. A079209, A079244, A079231, A079233, A079235, A079237, A079196, A079241, A079243, A063524.

Sequence in context: A009248 A012709 A032268 * A122677 A038177 A163047

Adjacent sequences:  A079242 A079243 A079244 * A079246 A079247 A079248

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified February 19 16:56 EST 2018. Contains 299356 sequences. (Running on oeis4.)