1,12

a(n) = #{m: A001222(m)>A020639(m), m<=n};

a(n) + A091373(n) + A091374(n) = n.

Table of n, a(n) for n=1..80.

Cf. A091375, A091371.

Sequence in context: A116563 A076695 A071903 * A185322 A068980 A053266

Adjacent sequences: A091369 A091370 A091371 * A091373 A091374 A091375

nonn

Reinhard Zumkeller, Jan 04 2004

approved