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 A164632 a(1)=1 followed by 2^k appearing 2^(2*k-1) times for k>0. 3
 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Occured when analyzing A056753 to construct a recurrence. LINKS R. Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA a(n) = f(n,1,1) with f(x,y,z) = if x=1 then z else if y=1 then f(x-1,2*z*z,2*z) else f(x-1,y-1,z). PROG (Haskell) a164632 n = a164632_list !! (n-1) a164632_list = 1 : concatMap (\x -> replicate (2^(2*x-1)) (2^x)) [1..] -- Reinhard Zumkeller, Feb 24 2012, Oct 17 2010 CROSSREFS Cf. A000079, A004171, A081294, A053644. Sequence in context: A283207 A164717 A164715 * A063095 A156726 A082852 Adjacent sequences:  A164629 A164630 A164631 * A164633 A164634 A164635 KEYWORD nonn AUTHOR Reinhard Zumkeller, Aug 23 2009 EXTENSIONS Typo in formula fixed by Reinhard Zumkeller, Oct 16 2010 STATUS approved

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Last modified January 19 05:41 EST 2019. Contains 319304 sequences. (Running on oeis4.)