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Search: id:A093616
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A093616 a(n) = smallest k such that k*n has exactly as many divisors as n^2. +0
3
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 8, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 8, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72 (list; graph; listen)
OFFSET

1,2

COMMENT

A000005(a(n)*n) =A000005(n^2) and A000005(m*n)<>A000005(n^2) for m<a(n);

a(A093617(n)) < n, a(A093618(n)) = n.

CROSSREFS

Cf. A000290, A048691.

Sequence in context: A106618 A080684 A159062 this_sequence A089247 A106620 A080685

Adjacent sequences: A093613 A093614 A093615 this_sequence A093617 A093618 A093619

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 06 2004

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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