0,3

Eric Postpischil Posting to sci.math newsgroup, May 21 1990

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Index entries for sequences related to semigroups

Cf. A001423, A001426, A023813, A023814, A027851.

a(n)+A079192(n)+A079195(n)+A079198(n)=A002489(n)

Sequence in context: A098342 A107995 A079244 this_sequence A034665 A067447 A083225

Adjacent sequences: A023812 A023813 A023814 this_sequence A023816 A023817 A023818

nonn

Lyle Ramshaw (ramshaw(AT)pa.dec.com)