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 A087000 Half length of periodic part of decimal expansion of 1/p for those primes having a periodic part of even length. 5
 3, 1, 3, 8, 9, 11, 14, 23, 29, 30, 4, 22, 48, 2, 17, 54, 56, 21, 65, 4, 23, 74, 39, 83, 89, 90, 96, 49, 15, 111, 114, 116, 15, 25, 128, 131, 134, 14, 73, 156, 55, 168, 58, 16, 183, 93, 189, 191, 194, 100, 102, 209, 70, 216, 16, 76, 230, 77, 243, 245, 249, 251 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = A002371(A049084(A086998(n)))/2 = A055642(A086999(n))/2 = A055642(A087001(n)) = A055642(A087002(n)). LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 CROSSREFS Cf. A028416, A002371. Sequence in context: A240665 A068958 A238106 * A289067 A010282 A119265 Adjacent sequences:  A086997 A086998 A086999 * A087001 A087002 A087003 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Jul 29 2003 STATUS approved

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Last modified October 17 15:00 EDT 2019. Contains 328115 sequences. (Running on oeis4.)