0,2
Cf. A042656.
Sequence in context: A019055 A041045 A041563 * A031875 A157817 A118718
Adjacent sequences: A042654 A042655 A042656 * A042658 A042659 A042660
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).