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Search: id:A058262
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| A058262 |
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a(n) is the quotient obtained when totient of primorial (product of p-1 values) is divided by LCM of the same p-1 values; p=Prime[n],..,Prime[n]. Identical LCM values are permitted. |
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+0
1
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| 1, 1, 2, 4, 8, 96, 384, 2304, 4608, 18432, 552960, 19906560, 796262400, 33443020800, 66886041600, 267544166400, 535088332800, 32105299968000, 2118949797888000, 148326485852160000, 10679506981355520000
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OFFSET
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0,3
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EXAMPLE
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n=7, LCM[2-1,3-1,5-1,7-1,11-1,13-1,17-1] =LCM[1,2,4,6,10,12,16]=240 Phi(2.3.5.7.11.13.17)=Phi(510510)=92160=A005867(8) a(7)=92160/240=384
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CROSSREFS
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Cf. A000010, A002110, A005867, A003418.
Sequence in context: A046385 A068664 A018605 this_sequence A018640 A018658 A018666
Adjacent sequences: A058259 A058260 A058261 this_sequence A058263 A058264 A058265
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Dec 06 2000
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