1,26

R. H. Hardin, Table of n, a(n) for n=1..1000

Cf. A001405.

Sequence in context: A161291 A175834 A161318 * A161037 A161088 A161304

Adjacent sequences: A161249 A161250 A161251 * A161253 A161254 A161255

nonn

R. H. Hardin, Jun 06 2009

approved