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A030099
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Numbers n such that n^3 has only odd digits.
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5
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1, 11, 15, 33, 39, 71, 91, 173, 175, 179, 211, 259, 335, 3337, 4631, 5597, 7353, 12415, 21353, 22893, 25799, 69491, 110011, 124975, 199831, 227353, 237151, 462815, 492415, 708415, 1100033, 2393695, 2620611, 5088493, 5828415
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Reinhard Zumkeller, Table of n, a(n) for n = 1..75
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MATHEMATICA
| fQ[n_] := Union@ OddQ@ IntegerDigits[n^3] == {True}; Select[2 Range[3*10^6] - 1, fQ] (* Robert G. Wilson v, Aug 13 2011 *)
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PROG
| (Haskell)
import Data.List (intersect)
a030099 n = a030099_list !! (n-1)
a030099_list = filter (null . (intersect "86420") . show . (^ 3)) [1, 3..]
-- Reinhard Zumkeller, Aug 13 2011
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CROSSREFS
| Cf. A000578, A030100, A034376, A052004.
Sequence in context: A094766 A009407 A009433 * A085597 A097512 A032490
Adjacent sequences: A030096 A030097 A030098 * A030100 A030101 A030102
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KEYWORD
| nonn,base,easy,nice
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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