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A079242 Number of associative non-commutative non-anti-associative anti-commutative closed binary operations on a set of order n. 9
0, 2, 2, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A079230(n)+A079232(n)+A079234(n)+A079236(n)+A079195(n)+A079240(n)+A079242(n)+A079244(n)+A063524(n)=A002489(n)

Each a(n) is equal to the sum of the products of each element in row n of A079208 and the corresponding element of A079210.

LINKS

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

Index entries for sequences related to semigroups

CROSSREFS

Cf. A079208, A079243, A079230, A079232, A079234, A079236, A079195, A079240, A079244, A063524.

Sequence in context: A062448 A248237 A139523 * A137384 A051148 A102645

Adjacent sequences:  A079239 A079240 A079241 * A079243 A079244 A079245

KEYWORD

nonn,more

AUTHOR

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

STATUS

approved

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Last modified February 24 23:02 EST 2018. Contains 299629 sequences. (Running on oeis4.)