1,4

a(n) = A008472(n) - A010051(n) * n. - Reinhard Zumkeller, Apr 05 2013

T. D. Noe, Table of n, a(n) for n=1..1000

a(12)=5 because 12's distinct prime factors 2 and 3 sum to 5.

(Haskell)

a105221 n = a008472 n - n * fromIntegral (a010051 n)

-- Reinhard Zumkeller, Apr 05 2013

Cf. A003508.

Cf. A008472

Sequence in context: A171388 A086134 A071090 * A215339 A061376 A058974

Adjacent sequences: A105218 A105219 A105220 * A105222 A105223 A105224

easy,nonn

Alexandre Wajnberg, Apr 13 2005

Edited by Don Reble, Nov 17 2005

approved