2,2
Sequence in context: A084420 A163882 A167017 * A121951 A085244 A180435
Adjacent sequences: A051103 A051104 A051105 * A051107 A051108 A051109
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
More terms from James A. Sellers (sellersj(AT)math.psu.edu)