cp's OEIS Frontend

A334200 Fully additive with a(n) = n-1 for n <= 3, and a(p) = 1 + a(A048673(p)) when p is prime > 3 and a(n*m) = a(n) + a(m) when m,n > 1.

%I A334200 #9 May 13 2020 18:59:14
%S A334200 0,1,2,2,3,3,4,3,4,4,5,4,5,5,5,4,5,5,5,5,6,6,6,5,6,6,6,6,5,6,6,5,7,6,
%T A334200 7,6,7,6,7,6,7,7,6,7,7,7,7,6,8,7,7,7,7,7,8,7,7,6,7,7,7,7,8,6,8,8,7,7,
%U A334200 8,8,8,7,7,8,8,7,9,8,8,7,8,8,8,8,8,7,7,8,9,8,9,8,8,8,8,7,8,9,9,8,8,8,8,8,9
%N A334200 Fully additive with a(n) = n-1 for n <= 3, and a(p) = 1 + a(A048673(p)) when p is prime > 3 and a(n*m) = a(n) + a(m) when m,n > 1.
%H A334200 Antti Karttunen, <a href="/A334200/b334200.txt">Table of n, a(n) for n = 1..65537</a>
%H A334200 <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a>
%o A334200 (PARI) A334200(n) = if(n<=3, n-1, if(isprime(n), 1+A334200((1+nextprime(1+n))/2), my(f=factor(n)); (apply(A334200, f[, 1])~ * f[, 2])));
%Y A334200 Cf. A048673, A334199.
%Y A334200 Cf. also A064097, A334206.
%K A334200 nonn
%O A334200 1,3
%A A334200 _Antti Karttunen_, May 13 2020