1,1
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Table of n, a(n) for n=1..13.
Sequence in context: A096265 A056041 A083017 * A006055 A052017 A277575
Adjacent sequences: A006507 A006508 A006509 * A006511 A006512 A006513
dead
N. J. A. Sloane, Jun 13 2012
approved