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: 0; 2,6; 3,10,78,3229; 2,1,12,30,246,495,48427,178914959

A079176(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 A079177(x).

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

Index entries for sequences related to groupoids

Cf. A079176, A079177, A079179.

Adjacent sequences: A079175 A079176 A079177 this_sequence A079179 A079180 A079181

Sequence in context: A109465 A090705 A130684 this_sequence A113552 A064736 A063929

nonn,tabf

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