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A081217 Greatest square-free number not exceeding n-th prime power. +0
3
1, 2, 3, 3, 5, 7, 7, 7, 11, 13, 15, 17, 19, 23, 23, 26, 29, 31, 31, 37, 41, 43, 47, 47, 53, 59, 61, 62, 67, 71, 73, 79, 79, 83, 89, 97, 101, 103, 107, 109, 113, 119, 123, 127, 127, 131, 137, 139, 149, 151, 157, 163, 167, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223 (list; graph; listen)
OFFSET

1,2

COMMENT

a(n) = A070321(A000961(n)).

CROSSREFS

Cf. A081218.

Sequence in context: A113470 A086786 A047844 this_sequence A053271 A035360 A027587

Adjacent sequences: A081214 A081215 A081216 this_sequence A081218 A081219 A081220

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 10 2003

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.


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