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 A354825 Dirichlet inverse of A293442, where A293442 is multiplicative with a(p^e) = A019565(e). 1
 1, -2, -2, 1, -2, 4, -2, -2, 1, 4, -2, -2, -2, 4, 4, 8, -2, -2, -2, -2, 4, 4, -2, 4, 1, 4, -2, -2, -2, -8, -2, -16, 4, 4, 4, 1, -2, 4, 4, 4, -2, -8, -2, -2, -2, 4, -2, -16, 1, -2, 4, -2, -2, 4, 4, 4, 4, 4, -2, 4, -2, 4, -2, 20, 4, -8, -2, -2, 4, -8, -2, -2, -2, 4, -2, -2, 4, -8, -2, -16, 8, 4, -2, 4, 4, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Multiplicative because A293442 is. LINKS Antti Karttunen, Table of n, a(n) for n = 1..16384 Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537 FORMULA a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d0, p = nextprime(1+p); if(n%2, m *= p); n >>= 1); (m); }; A293442(n) = factorback(apply(e -> A019565(e), factor(n)[, 2])); memoA354825 = Map(); A354825(n) = if(1==n, 1, my(v); if(mapisdefined(memoA354825, n, &v), v, v = -sumdiv(n, d, if(d

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Last modified August 13 20:02 EDT 2024. Contains 375144 sequences. (Running on oeis4.)