0,7

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

a(n) = A000041(n) - A001935(n).

Cf. A047967 (at least one multiple of 2), A295341 (at least one multiple of 3).

Sequence in context: A239952 A240076 A266771 * A226635 A024788 A285472

Adjacent sequences: A295339 A295340 A295341 * A295343 A295344 A295345

nonn

R. J. Mathar, Nov 20 2017

approved