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A290080 a(1) = 0; for n > 1, a(n) = sigma(bigomega(n)). 3

%I #5 Jul 23 2017 21:49:25

%S 0,1,1,3,1,3,1,4,3,3,1,4,1,3,3,7,1,4,1,4,3,3,1,7,3,3,4,4,1,4,1,6,3,3,

%T 3,7,1,3,3,7,1,4,1,4,4,3,1,6,3,4,3,4,1,7,3,7,3,3,1,7,1,3,4,12,3,4,1,4,

%U 3,4,1,6,1,3,4,4,3,4,1,6,7,3,1,7,3,3,3,7,1,7,3,4,3,3,3,12,1,4,4,7,1,4,1,7,4

%N a(1) = 0; for n > 1, a(n) = sigma(bigomega(n)).

%H Antti Karttunen, <a href="/A290080/b290080.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Eu#epf">Index entries for sequences computed from exponents in factorization of n</a>

%F a(1) = 0; for n > 1, a(n) = A000203(A001222(n)).

%F a(n) = A193511(n) + A193512(n).

%o (Scheme) (define (A290080 n) (if (= 1 n) 0 (A000203 (A001222 n))))

%Y Cf. A000203, A001222, A193511, A193512.

%Y Differs from A289617 for the first time at n=32, where a(n) = 6, while A289617(32) = 8.

%K nonn

%O 1,4

%A _Antti Karttunen_, Jul 23 2017

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