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A230843 Cubefree numbers which in their canonical prime factorization have mutually distinct exponents. 1
1, 2, 3, 4, 5, 7, 9, 11, 12, 13, 17, 18, 19, 20, 23, 25, 28, 29, 31, 37, 41, 43, 44, 45, 47, 49, 50, 52, 53, 59, 61, 63, 67, 68, 71, 73, 75, 76, 79, 83, 89, 92, 97, 98, 99, 101, 103, 107, 109, 113, 116, 117, 121, 124, 127, 131, 137, 139, 147, 148, 149, 151, 153, 157, 163, 164, 167, 169, 171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Intersection of A004709 and A130091.

LINKS

Table of n, a(n) for n=1..69.

CROSSREFS

Sequence in context: A210994 A319237 A258456 * A188551 A045782 A184112

Adjacent sequences:  A230840 A230841 A230842 * A230844 A230845 A230846

KEYWORD

nonn,easy

AUTHOR

Gerasimov Sergey, Oct 31 2013

STATUS

approved

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Last modified September 19 12:57 EDT 2019. Contains 327198 sequences. (Running on oeis4.)