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A079192 Number of non-associative non-commutative closed binary operations on a set of order n. 7
0, 6, 18904, 4293916368 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

A079192(n)+A079195(n)+A079198(n)+A023815(n)=A002489(n).

Each a(n) is equal to the sum of the products of each element in row n of A079194 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. A079193, A079194, A079195, A079198, A023815.

Sequence in context: A130434 A121571 A123659 * A143780 A159429 A134728

Adjacent sequences:  A079189 A079190 A079191 * A079193 A079194 A079195

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 15:18 EST 2012. Contains 205823 sequences.