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A036447
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Double and reverse digits.
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2
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1, 2, 4, 8, 61, 221, 244, 884, 8671, 24371, 24784, 86594, 881371, 2472671, 2435494, 8890784, 86518771, 245730371, 247064194, 883821494, 8892467671, 24353948771, 24579870784, 86514795194, 883095920371, 2470481916671, 2433383690494
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Harvey P. Dale, Table of n, a(n) for n = 0..1000
Nick Hobson, Python program for this sequence
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FORMULA
| a(n+1) = A004093(a(n)). [Reinhard Zumkeller, Feb 09 2012]
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MATHEMATICA
| NestList[ FromDigits[ Reverse[ IntegerDigits[ 2# ] ] ] &, 1, 27 ]
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PROG
| (Haskell)
a036447 n = a036447_list !! n
a036447_list = iterate a004093 1 -- Reinhard Zumkeller, Feb 09 2012
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CROSSREFS
| Cf. A004086.
Sequence in context: A004094 A028910 A018482 * A069027 A065549 A067507
Adjacent sequences: A036444 A036445 A036446 * A036448 A036449 A036450
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KEYWORD
| nonn,base,easy,nice,changed
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AUTHOR
| Rodolfo Kurchan (nildafur(AT)cvtci.com.ar)
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EXTENSIONS
| More terms from Larry Reeves (larryr(AT)acm.org), Mar 31 2000
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