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 A208769 Dirichlet inverse of the finite group count (A000001). 1
 1, -1, -1, -1, -1, 0, -1, -2, -1, 0, -1, 0, -1, 0, 1, -5, -1, 0, -1, 0, 0, 0, -1, -1, -1, 0, -2, 1, -1, 0, -1, -23, 1, 0, 1, 0, -1, 0, 0, 0, -1, 0, -1, 1, 1, 0, -1, -8, -1, 0, 1, 0, -1, -1, 0, -1, 0, 0, -1, 0, -1, 0, 1, -159, 1, 0, -1, 0, 1, 0, -1, -6, -1, 0, 0, 1, 1, 0, -1, -10, -6, 0, -1, 1, 1, 0, 1, 0, -1, 0, 1, 1, 0, 0, 1, -60, -1, 0, 1, -2, -1, 0, -1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 LINKS Antti Karttunen, Table of n, a(n) for n = 1..2047 (computed from the b-file of A000001) Wikipedia, Dirichlet convolution (Dirichlet inverse) FORMULA a(1) = 1; for n > 1, a(n) = -Sum_{d|n, d

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Last modified June 21 19:12 EDT 2021. Contains 345365 sequences. (Running on oeis4.)