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 A328571 Primorial base expansion of n converted into its prime product form, but with all nonzero digits replaced by 1's: a(n) = A007947(A276086(n)). 7
 1, 2, 3, 6, 3, 6, 5, 10, 15, 30, 15, 30, 5, 10, 15, 30, 15, 30, 5, 10, 15, 30, 15, 30, 5, 10, 15, 30, 15, 30, 7, 14, 21, 42, 21, 42, 35, 70, 105, 210, 105, 210, 35, 70, 105, 210, 105, 210, 35, 70, 105, 210, 105, 210, 35, 70, 105, 210, 105, 210, 7, 14, 21, 42, 21, 42, 35, 70, 105, 210, 105, 210, 35, 70, 105, 210, 105, 210, 35, 70 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Antti Karttunen, Table of n, a(n) for n = 0..32768 FORMULA a(n) = A007947(A276086(n)). a(n) = A276086(n) / A328572(n). a(A276156(n)) = A276086(A276156(n)). [And at no other points the equality holds] A001221(a(n)) = A267263(n). PROG (PARI) A328571(n) = { my(m=1, p=2); while(n, m *= (p^!!(n%p)); n = n\p; p = nextprime(1+p)); (m); }; CROSSREFS Cf. A001221, A007947, A267263, A276086, A328572. Cf. A276156 (gives the indices where this coincides with A276086). Sequence in context: A261814 A240965 A084228 * A275733 A245499 A323642 Adjacent sequences:  A328568 A328569 A328570 * A328572 A328573 A328574 KEYWORD nonn AUTHOR Antti Karttunen, Oct 20 2019 STATUS approved

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Last modified February 27 09:40 EST 2020. Contains 332301 sequences. (Running on oeis4.)