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Search: id:A076745
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A076745 a(n) = the least positive integer k such that b(k) = n, where b(k) (A076526) is defined by b(k) = r * max{e_1,...,e_r} if k = p_1^e_1 *...* p_r^e_r is the canonical prime factorization of k. +0
2
2, 4, 8, 12, 32, 24, 128, 48, 120, 96, 2048, 192, 8192, 384, 480, 768 (list; graph; listen)
OFFSET

1,1

LINKS

C. Rivera, Puzzle 201: The Arithmetic Function A(n)

EXAMPLE

a(12) = 2 * max{1,2} = 4 since 12 = 2^2 * 3^1 and 12 is the least k for which b(k) = 4. Hence a(4) = 12.

CROSSREFS

Cf. A076526.

Sequence in context: A036493 A082906 A085083 this_sequence A007374 A105207 A133802

Adjacent sequences: A076742 A076743 A076744 this_sequence A076746 A076747 A076748

KEYWORD

nonn

AUTHOR

Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Nov 11 2002

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


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