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 A211245 Order of 9 mod n-th prime: least k such that prime(n) divides 9^k-1. 6
 1, 0, 2, 3, 5, 3, 8, 9, 11, 14, 15, 9, 4, 21, 23, 26, 29, 5, 11, 35, 6, 39, 41, 44, 24, 50, 17, 53, 27, 56, 63, 65, 68, 69, 74, 25, 39, 81, 83, 86, 89, 45, 95, 8, 98, 99, 105, 111, 113, 57, 116, 119, 60, 125, 128, 131, 134, 15, 69, 140, 141, 146, 17, 155, 39 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 MATHEMATICA nn = 9; Table[If[Mod[nn, p] == 0, 0, MultiplicativeOrder[nn, p]], {p, Prime[Range[100]]}] PROG (GAP) A000040:=Filtered([1..350], IsPrime);; List([1..Length(A000040)], n->OrderMod(9, A000040[n])); # Muniru A Asiru, Feb 06 2019 CROSSREFS Cf. A014664, A062117, A082654, A211241, A211242, A211243, A211244, A002371. Sequence in context: A161984 A125677 A051358 * A107473 A105574 A105562 Adjacent sequences:  A211242 A211243 A211244 * A211246 A211247 A211248 KEYWORD nonn AUTHOR T. D. Noe, Apr 11 2012 STATUS approved

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Last modified December 8 14:38 EST 2019. Contains 329865 sequences. (Running on oeis4.)