0,3
I would very much like to find a formula for this - N. J. A. Sloane (njas(AT)research.att.com).
Sequence in context: A007808 A104989 A119906 * A192209 A154677 A121586
Adjacent sequences: A059723 A059724 A059725 * A059727 A059728 A059729
nonn
N. J. A. Sloane (njas(AT)research.att.com), Feb 09 2001