1,2

G. C. Greubel, Table of n, a(n) for n = 1..10000

a(n) = A000302(A001222(n)) = 4^bigomega(n) = 4^A001222(n).

4^PrimeOmega[Range[100]] (* G. C. Greubel, Apr 09 2016 *)

(PARI) a(n) = 4^bigomega(n); \\ Altug Alkan, Apr 09 2016

Sequence in context: A268169 A177241 A076821 * A056959 A255300 A255298

Adjacent sequences: A165822 A165823 A165824 * A165826 A165827 A165828

nonn,mult

Jaroslav Krizek, Sep 28 2009

approved