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A088382 Numbers not exceeding the 4th power of their smallest prime-factor. 4
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 89, 91, 95, 97, 101, 103, 107, 109, 113, 115, 119, 121, 125, 127, 131, 133 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(n) <= A020639(a(n))^4 = A088379(a(n)); complement of A088383;
a(n) < A088383(k) for n <= 67, a(n) > A088383(k) for n > 67.
LINKS
MATHEMATICA
Select[Range[200], #<=FactorInteger[#][[1, 1]]^4&] (* Harvey P. Dale, Jan 25 2015 *)
PROG
(Haskell)
a088382 n = a088382_list !! (n-1)
a088382_list = [x | x <- [1..], x <= a020639 x ^ 4]
-- Reinhard Zumkeller, Feb 06 2015
CROSSREFS
Sequence in context: A098451 A164710 A098452 * A247759 A247752 A291149
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Sep 28 2003
STATUS
approved

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Last modified July 24 02:45 EDT 2024. Contains 374575 sequences. (Running on oeis4.)