0,3
Cf. A041728.
Sequence in context: A121621 A119715 A023273 * A078665 A163666 A093552
Adjacent sequences: A041726 A041727 A041728 * A041730 A041731 A041732
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).