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A079202 Number of isomorphism classes of non-associative non-commutative non-anti-associative non-anti-commutative closed binary operations on a set of order n, listed by class size. 9
0, 0, 0, 0, 0, 32, 2155, 0, 0, 0, 12, 60, 184, 34544, 147032271 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
COMMENTS
Elements per row: 1,2,4,8,16,30,... (given by A027423, number of positive divisors of n!)
First four rows: 0; 0,0; 0,0,32,2155; 0,0,0,12,60,184,34544,147032271
A079230(x) is equal to the sum of the products of each element in row x of this sequence and the corresponding element of A079210.
The sum of each row x of this sequence is given by A079231(x).
LINKS
CROSSREFS
Sequence in context: A268077 A202547 A222830 * A294607 A294953 A239402
KEYWORD
nonn,tabf
AUTHOR
Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003
STATUS
approved

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Last modified July 22 12:22 EDT 2024. Contains 374499 sequences. (Running on oeis4.)