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 A090691 5x - 1 sequence starting at 50. 0
 50, 25, 124, 62, 31, 154, 77, 384, 192, 96, 48, 24, 12, 6, 3, 14, 7, 34, 17, 84, 42, 21, 104, 52, 26, 13, 64, 32, 16, 8, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(1) = 50, a(n+1) = a(n)/2 if a(n) even, otherwise 5*a(n) - 1. MATHEMATICA NestList[If[EvenQ[#], #/2, 5# - 1] &, 50, 100] (* Alonso del Arte, Aug 12 2016 *) PROG (MAGMA) [n eq 1 select 50 else IsOdd(Self(n-1)) select 5*Self(n-1)-1 else Self(n-1) div 2: n in [1..80]]; // Vincenzo Librandi, Aug 21 2016 CROSSREFS Cf. A008880. Sequence in context: A072460 A248128 A033370 * A033980 A207149 A207142 Adjacent sequences:  A090688 A090689 A090690 * A090692 A090693 A090694 KEYWORD nonn,easy AUTHOR Daniil Khanin (daniil(AT)ispms.tsc.ru), Feb 06 2004 EXTENSIONS More terms from Ray Chandler, Feb 08 2004 New definition by Alonso del Arte, Aug 12 2016 STATUS approved

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Last modified September 24 22:27 EDT 2018. Contains 315360 sequences. (Running on oeis4.)