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Search: id:A060048
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A060048 a(1) = 1 and for n>1 a(n) = Max { q prime | q# < p(n)# / q# } where p(i) = A000040(i) and p(i)# = A002110(i), primorial. +0
2
1, 2, 2, 3, 5, 5, 7, 11, 11, 13, 13, 17, 19, 19, 23, 23, 29, 31, 31, 37, 37, 41, 43, 43, 47, 47, 53, 53, 59, 61, 61, 67, 67, 71, 71, 73, 79, 79, 83, 83, 89, 97, 97, 101, 101, 103, 103, 107, 109, 109, 113, 113, 127, 127, 131, 131, 137, 139, 139, 149, 149, 151, 151, 157 (list; graph; listen)
OFFSET

1,2

EXAMPLE

p(10) = 29: 2*3*5*7*11*13 < 17*19*23*29 and as 2*3*5*7*11*13*17 > 19*23*29 we have a(10) = 13.

CROSSREFS

A000040, A002110.

Sequence in context: A008507 A028364 A011971 this_sequence A110699 A035537 A101779

Adjacent sequences: A060045 A060046 A060047 this_sequence A060049 A060050 A060051

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 06 2001

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.


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