1,2

A variant of A141586, which is a subsequence.

Table of n, a(n) for n=1..75.

N. J. A. Sloane, Maple program

Cf. A141586, A143718.

Sequence in context: A068938 A166937 A039250 * A072601 A039192 A188087

Adjacent sequences: A135127 A135128 A135129 * A135131 A135132 A135133

nonn

N. J. A. Sloane, Nov 29 2008

approved