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A135130 Let n = Product_{p} p ^ e_p be the prime factorization of n and let M = max{e_p + 1 }. Then n is in the sequence iff for all primes q in the range 3 <= q <= M we have e_q >= Sum_{r} floor( log_q (e_r + 1) ). 4
1, 2, 3, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 21, 22, 23, 24, 26, 27, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 45, 46, 47, 51, 53, 54, 55, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 69, 70, 71, 72, 73, 74, 75, 77, 78, 79, 82, 83, 84, 85, 86, 87, 89, 90, 91, 93, 94, 95, 97 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A variant of A141586, which is a subsequence.

LINKS

Table of n, a(n) for n=1..75.

N. J. A. Sloane, Maple program

CROSSREFS

Cf. A141586, A143718.

Sequence in context: A068938 A166937 A039250 * A072601 A039192 A188087

Adjacent sequences:  A135127 A135128 A135129 * A135131 A135132 A135133

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 29 2008

STATUS

approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)