0,6

Table of n, a(n) for n=0..49.

a(n) = A000041(n)-A000726(n).

Cf. A000041, A000726, A047967 (at least one multiple of 2), A295342 (at least one multiple of 4).

Sequence in context: A034748 A069916 A153140 * A139135 A097197 A260600

Adjacent sequences: A295338 A295339 A295340 * A295342 A295343 A295344

nonn

R. J. Mathar, Nov 20 2017

approved