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 A188901 Integers in the sequences (arithmetic derivative of k) divided by k. 1
 0, 1, 2, 1, 3, 2, 4, 3, 2, 5, 4, 3, 1, 6, 5, 4, 2, 7, 3, 6, 5, 3, 8, 4, 2, 7, 6, 4, 9, 5, 3, 8, 4, 7, 5, 1, 10, 6, 4, 9, 5, 3, 8, 6, 2, 11, 7, 5, 10, 6, 4, 2, 9, 7, 3, 5, 12, 8, 6, 2, 11, 7, 5, 3, 10, 8, 4, 6, 4, 13, 9, 7, 3, 12, 8, 6, 4, 11 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Integers in the sequence (k'/k) = A003415(k)/k. See A072873 for the values of k where k'/k is an integer. LINKS Alois P. Heinz, Table of n, a(n) for n = 1..10000 (first 2500 terms from Nathaniel Johnston) EXAMPLE 1' = 0, 0/1 = 0 -> a(1) = 0; 4' = 4 ,4/4 = 1 -> a(2) = 1; 16' = 32, 32/16 = 2 -> a(3) = 2. CROSSREFS Cf. A003415, A068311, A072873, A083346, A083346, A085731, A086130, A189100, A189102. Sequence in context: A046823 A224989 A124876 * A171618 A344096 A253138 Adjacent sequences: A188898 A188899 A188900 * A188902 A188903 A188904 KEYWORD nonn AUTHOR Giorgio Balzarotti, Apr 16 2011 STATUS approved

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Last modified March 1 06:09 EST 2024. Contains 370430 sequences. (Running on oeis4.)