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 A324575 a(1) = 0; for n > 1, a(n) = A033879(A048675(n)). 6
 0, 1, 1, 1, 1, 2, 1, 2, 1, 4, 1, 1, 1, 5, 0, 1, 1, 4, 1, 0, 2, 16, 1, 4, 1, 18, 0, 2, 1, 6, 1, 4, -3, 46, -4, 0, 1, 82, 14, 6, 1, 10, 1, -3, 1, 256, 1, 0, 1, 5, -12, 14, 1, 6, -2, 10, 8, 226, 1, 1, 1, 748, -4, 0, -19, 18, 1, -12, -12, 12, 1, 6, 1, 1362, 2, 8, -12, 22, 1, 1, 1, 3838, 1, -4, 10, 5458, 254, 18, 1, 5, -10, -12, -348, 12250 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 FORMULA a(1) = 0; for n > 1, a(n) = A033879(A048675(n)). a(n) = 2*A048675(n) - A324573(n). a(A007947(n)) = A324574(n). a(p) = 1 for all primes p. PROG (PARI) A033879(n) = (2*n-sigma(n)); A048675(n) = { my(f = factor(n)); sum(k=1, #f~, f[k, 2]*2^primepi(f[k, 1]))/2; }; A324575(n) = if(1==n, 0, A033879(A048675(n))); CROSSREFS Cf. A007947, A033879, A048675, A324573, A324574. Cf. also A323244, A323174, A324546. Sequence in context: A225765 A300588 A030359 * A035400 A235918 A071222 Adjacent sequences:  A324572 A324573 A324574 * A324576 A324577 A324578 KEYWORD sign AUTHOR Antti Karttunen, Mar 07 2019 STATUS approved

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Last modified March 30 16:16 EDT 2020. Contains 333127 sequences. (Running on oeis4.)