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 A328958 a(n) = sigma_0(n) - omega(n) * nu(n), where sigma_0 = A000005, nu = A001221, omega = A001222. 12
 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, -1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, -1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, -1, 1, 0, 0, -1, 1, 2, 1, 0, 0, 0, 0, -1, 1, 0, 1, 0, 1, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,72 LINKS FORMULA a(n) = A000005(n) - A001222(n) * A001221(n). EXAMPLE a(144) = sigma_0(144) - omega(144) * nu(144) = 15 - 6 * 2 = 3. MATHEMATICA Table[DivisorSigma[0, n]-PrimeOmega[n]*PrimeNu[n], {n, 100}] CROSSREFS Positions of first appearances are A328962. Zeros are A328956. Nonzeros are A328957. omega(n) * nu(n) is A113901(n). (omega(n) - 1) * nu(n) is A307409(n). sigma_0(n) - 2 - (omega(n) - 1) * nu(n) is A328959(n). Cf. A000005, A001221, A001222, A112798, A124010, A323023, A328960, A328961, A328963, A328964. Sequence in context: A068933 A015472 A049816 * A143542 A072612 A116378 Adjacent sequences:  A328955 A328956 A328957 * A328959 A328960 A328961 KEYWORD sign AUTHOR Gus Wiseman, Nov 02 2019 STATUS approved

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Last modified July 27 09:47 EDT 2021. Contains 346304 sequences. (Running on oeis4.)