0,2
Cf. A000522, A008290.
Sequence in context: A101439 A099112 A172750 * A034208 A003834 A152296
Adjacent sequences: A086894 A086895 A086896 * A086898 A086899 A086900
nonn
Vladeta Jovovic (vladeta(AT)eunet.rs), Aug 22 2003