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A088380 Numbers not exceeding the cube of their smallest prime-factor. 4
1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 35, 37, 41, 43, 47, 49, 53, 55, 59, 61, 65, 67, 71, 73, 77, 79, 83, 85, 89, 91, 95, 97, 101, 103, 107, 109, 113, 115, 119, 121, 125, 127, 131, 133, 137, 139, 143, 149, 151, 157, 161, 163, 167, 169 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) <= A020639(a(n))^3 = A088378(a(n)); complement of A088381;

a(n) < A088381(k) for n <= 28, a(n) > A088381(k) for n > 28.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a088380 n = a088382_list !! (n-1)

a088380_list = [x | x <- [1..], x <= a020639 x ^ 3]

-- Reinhard Zumkeller, Feb 06 2015

CROSSREFS

Cf. A000430, A088382, A020639, A088378, A088381.

Sequence in context: A322341 A080676 A033061 * A122620 A218470 A008727

Adjacent sequences:  A088377 A088378 A088379 * A088381 A088382 A088383

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 28 2003

STATUS

approved

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Last modified August 14 13:57 EDT 2020. Contains 336481 sequences. (Running on oeis4.)