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 A324931 Integers in the list of quotients of positive integers by their product of prime indices. 17
 1, 2, 4, 3, 8, 6, 16, 12, 7, 5, 32, 9, 24, 14, 10, 64, 18, 48, 28, 20, 128, 36, 19, 13, 21, 15, 96, 27, 56, 40, 256, 72, 38, 26, 11, 42, 30, 192, 54, 112, 17, 80, 512, 144, 76, 52, 22, 84, 60, 384, 49, 23, 35, 53, 108, 37, 224, 25, 57, 39, 34, 160, 63, 1024 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS These quotients are given by A324932(n)/A324933(n). This is a permutation of the positive integers, with inverse A324934. LINKS FORMULA a(n) = A324850(n)/A003963(A324850(n)). EXAMPLE The sequence of quotients n/A003963(n) begins: 1, 2, 3/2, 4, 5/3, 3, 7/4, 8, 9/4, 10/3, 11/5, 6, 13/6, 7/2, 5/2, 16, ... MATHEMATICA Select[Table[n/Times@@Cases[If[n==1, {}, FactorInteger[n]], {p_, k_}:>PrimePi[p]^k], {n, 100}], IntegerQ] CROSSREFS Cf. A003963, A109129, A120383, A196050, A324846, A324849, A324850, A324922, A324923, A324924, A324925, A324934. Sequence in context: A284571 A124833 A181815 * A168521 A244982 A101468 Adjacent sequences:  A324928 A324929 A324930 * A324932 A324933 A324934 KEYWORD nonn AUTHOR Gus Wiseman, Mar 21 2019 STATUS approved

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Last modified April 10 11:32 EDT 2021. Contains 342845 sequences. (Running on oeis4.)