1,2

A079178(n)+A079181(n)=A079171(n).

Elements per row: 1,2,4,8,16,30,... (given by A027423, number of positive divisors of n!)

First four rows: 1; 2,0; 0,2,0,8; 0,0,2,0,29,0,383,17366

A079179(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 A079180(x).

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

Index entries for sequences related to groupoids

Cf. A079176, A079177.

Sequence in context: A046113 A143068 A028959 this_sequence A093693 A025436 A134109

Adjacent sequences: A079178 A079179 A079180 this_sequence A079182 A079183 A079184

nonn,tabf

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