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A144494 a(n) = 0 if n is prime, otherwise A001222(n). 8
0, 0, 0, 2, 0, 2, 0, 3, 2, 2, 0, 3, 0, 2, 2, 4, 0, 3, 0, 3, 2, 2, 0, 4, 2, 2, 3, 3, 0, 3, 0, 5, 2, 2, 2, 4, 0, 2, 2, 4, 0, 3, 0, 3, 3, 2, 0, 5, 2, 3, 2, 3, 0, 4, 2, 4, 2, 2, 0, 4, 0, 2, 3, 6, 2, 3, 0, 3, 2, 3, 0, 5, 0, 2, 3, 3, 2, 3, 0, 5, 4, 2, 0, 4, 2, 2, 2, 4, 0, 4, 2, 3, 2, 2, 2, 6, 0, 3, 3, 4, 0, 3, 0, 4, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..5000

MAPLE

with(numtheory); f:=n->if isprime(n) then 0 else bigomega(n); fi;

MATHEMATICA

Table[If[PrimeQ[n], 0, PrimeOmega[n]], {n, 1, 100}] (* G. C. Greubel, Apr 25 2017 *)

CROSSREFS

Cf. A001221, A001222, A087624, A055636.

Sequence in context: A153585 A169611 A242460 * A136166 A259525 A319071

Adjacent sequences:  A144491 A144492 A144493 * A144495 A144496 A144497

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 12 2008

STATUS

approved

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Last modified December 11 10:48 EST 2018. Contains 318049 sequences. (Running on oeis4.)