2,2
Cf. A068239-A068305, A000332, A002417, A027441.
Sequence in context: A003810 A003803 A172794 * A034656 A119478 A101816
Adjacent sequences: A068240 A068241 A068242 * A068244 A068245 A068246
nonn
R. H. Hardin (rhhardin(AT)att.net), Feb 24 2002