1,2

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 A079200 and the corresponding element of A079210.

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

Index entries for sequences related to semigroups

Cf. A023815, A079192, A079195, A079199, A079200.

Sequence in context: A083941 A080263 A088920 this_sequence A080293 A084107 A057943

Adjacent sequences: A079195 A079196 A079197 this_sequence A079199 A079200 A079201

nonn

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