1,3
Cf. A002477, A048412.
Sequence in context: A002779 A028817 A057136 * A065379 A063783 A168138
Adjacent sequences: A048408 A048409 A048410 * A048412 A048413 A048414
nonn,base,more
Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 1999.