0,3
Cf. A042724.
Sequence in context: A068366 A156499 A137881 * A041096 A007541 A087485
Adjacent sequences: A042722 A042723 A042724 * A042726 A042727 A042728
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).