1,9
See A210109 for further information.
Computed by David Scambler, Mar 19 2012
Table of n, a(n) for n=1..16.
Cf. A210109.
Sequence in context: A018214 A181478 A223841 * A056268 A001117 A224149
Adjacent sequences: A210319 A210320 A210321 * A210323 A210324 A210325
nonn,more
N. J. A. Sloane, Mar 20 2012
approved