2,2
Cf. A068239-A068305, A000332, A002417, A027441.
Sequence in context: A017459 A017591 A080796 * A038829 A038818 A015392
Adjacent sequences: A068239 A068240 A068241 * A068243 A068244 A068245
nonn
R. H. Hardin (rhhardin(AT)att.net), Feb 24 2002