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A089247
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a(n) = smallest number obtainable by permuting the exponents in the prime factorization of n.
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6
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 12, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 20, 51, 52, 53, 24, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
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PROG
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(Haskell)
import Data.List (sort)
a089247 n = product $ zipWith (^)
(a027748_row n) (reverse $ sort $ a124010_row n)
-- Reinhard Zumkeller, Apr 27 2013
(PARI) a(n)=my(f=factor(n)); f[, 2]=vecsort(f[, 2], , 4); factorback(f) \\ Charles R Greathouse IV, Sep 02 2015
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CROSSREFS
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Cf. A027748, A124010, A046523, A071364, A085079.
Sequence in context: A301274 A093616 A331172 * A167974 A106620 A080685
Adjacent sequences: A089244 A089245 A089246 * A089248 A089249 A089250
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KEYWORD
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easy,nonn
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AUTHOR
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Sam Alexander, Dec 11 2003
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STATUS
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approved
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