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 A324885 a(1) = 0; for n > 1, a(n) = A001511(A323243(n)). 3

%I

%S 0,1,1,3,1,2,1,4,3,1,1,3,1,2,2,4,1,2,1,3,1,5,1,4,3,3,4,5,1,6,1,6,2,5,

%T 2,4,1,2,5,4,1,2,1,3,3,6,1,5,3,1,3,3,1,2,1,4,5,2,1,3,1,5,3,4,2,6,1,5,

%U 2,2,1,4,1,3,2,5,2,6,1,5,4,5,1,3,5,4,6,5,1,2,1,6,2,5,3,4,1,1,5,4,1,2,1,4,6

%N a(1) = 0; for n > 1, a(n) = A001511(A323243(n)).

%H Antti Karttunen, <a href="/A324885/b324885.txt">Table of n, a(n) for n = 1..10000</a> (based on Hans Havermann's factorization of A156552)

%H <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a>

%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>

%F a(1) = 0; for n > 1, a(n) = A001511(A323243(n)).

%F For n > 1, a(n) = A286357(A156552(n)).

%o (PARI)

%o A001511ext(n) = if(!n,n,sign(n)*(1+valuation(n,2))); \\ Like A001511 but gives 0 for 0 and -A001511(-n) for negative numbers.

%o A324885(n) = A001511ext(A323243(n)); \\ Needs also code from A323243.

%Y Cf. A001511, A156552, A286357, A323243, A324725, A324813 (positions of terms <= 1), A324817, A324823, A324883.

%K nonn

%O 1,4

%A _Antti Karttunen_, Mar 28 2019

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Last modified December 6 21:48 EST 2019. Contains 329809 sequences. (Running on oeis4.)