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 A185038 Positions at which A090895 (a(1) = 1 then a(n) = a(n-1)/2 if a(n-1) is even, a(n) = a(n-1) + n otherwise) reach the value of 1. 2
 1, 8, 15, 64, 7069, 229826, 62906548, 104509874538, 209233407362, 474536678820, 2653613575299, 14802269029898 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS It seems that this sequence is infinite. LINKS EXAMPLE Example: the sequence a(1)=1 then a(n)=a(n-1)/2 if a(n-1) is even, a(n) = a(n-1) + n otherwise goes 1, 3, 6, 3, 8, 4, 2, 1, 10, 5, 16, 8, 4, 2, 1, etc... which has ones at 1, 8, 15, 64, etc... PROG (Haskell) import Data.List (elemIndices) a185038 n = a185038_list !! (n-1) a185038_list = map (+ 1) \$ elemIndices 1 a090895_list -- Reinhard Zumkeller, Mar 02 2012 CROSSREFS Cf. A090895. Sequence in context: A166704 A161342 A048732 * A193490 A015442 A253211 Adjacent sequences:  A185035 A185036 A185037 * A185039 A185040 A185041 KEYWORD more,hard,nonn AUTHOR Sergio Pimentel, Mar 01 2012 EXTENSIONS a(8)-a(12) from Hiroaki Yamanouchi, Oct 04 2014 STATUS approved

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Last modified December 12 01:57 EST 2019. Contains 329948 sequences. (Running on oeis4.)