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A062794
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Moebius transform of n!.
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3
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1, 1, 5, 22, 119, 713, 5039, 40296, 362874, 3628679, 39916799, 479000858, 6227020799, 87178286159, 1307674367875, 20922789847680, 355687428095999, 6402373705364406, 121645100408831999, 2432902008173011178
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OFFSET
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1,3
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COMMENTS
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n=5, f[5]=120, divisors={1,5} f[5/d]={120,1}, mu[d]={1,-1}, the sum is 120-1=119=a(5)
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LINKS
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FORMULA
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a(n) = Sum{f[n/d]*mu[d]}, where d|n and f[x]=A000142(x).
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PROG
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(PARI) a(n) = sumdiv(n, d, d!*moebius(n/d)); \\ Michel Marcus, Nov 04 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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