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Search: id:A038110
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| A038110 |
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(Numerator of) frequency of integers with smallest divisor Prime[ n ]. |
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+0
6
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| 1, 1, 1, 4, 8, 16, 192, 3072, 55296, 110592, 442368, 13271040, 477757440, 19110297600, 802632499200, 1605264998400, 6421059993600, 12842119987200, 770527199232000, 50854795149312000, 3559835660451840000
(list; graph; listen)
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OFFSET
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1,4
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LINKS
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F. Ellermann, Illustration for A002110, A005867, A038110, A060753
Eric Weisstein's World of Mathematics, Euler Product
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FORMULA
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a(n) = A005867(n) / gcd( A005867(n), A002110(n) ).
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EXAMPLE
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a(10) = 110592 = ( 1*2*4*6*10*12*16*18*22 ) / ( 2*3*5*11 )
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MATHEMATICA
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Numerator@Table[ Product[ 1-1/Prime[ k ], {k, n-1} ]/Prime[ n ], {n, 1, 64} ]
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CROSSREFS
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Cf. A038111, A002110, A005867, A060753.
Sequence in context: A102358 A038238 A023376 this_sequence A130436 A090804 A074025
Adjacent sequences: A038107 A038108 A038109 this_sequence A038111 A038112 A038113
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KEYWORD
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nonn,frac
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AUTHOR
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Wouter Meeussen (wouter.meeussen(AT)pandora.be)
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