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a(n) = Product_{d|n} psi(d), where psi(m) is the sum of totatives of m (A023896).
#10 by Sean A. Irvine at Wed Sep 10 17:01:03 EDT 2025
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#9 by Sean A. Irvine at Wed Sep 10 17:01:00 EDT 2025
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#8 by Charles R Greathouse IV at Thu Sep 08 08:46:18 EDT 2022
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Thu Sep 08
08:46
OEIS Server: https://oeis.org/edit/global/2944
#7 by N. J. A. Sloane at Sat Dec 31 01:46:10 EST 2016
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#6 by Michael De Vlieger at Fri Dec 30 10:37:05 EST 2016
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#5 by Michael De Vlieger at Fri Dec 30 10:37:03 EST 2016
MATHEMATICA
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#4 by Jaroslav Krizek at Fri Dec 30 04:01:05 EST 2016
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#3 by Jaroslav Krizek at Fri Dec 30 04:00:56 EST 2016
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#2 by Jaroslav Krizek at Thu Dec 29 19:16:01 EST 2016
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#1 by Jaroslav Krizek at Thu Dec 29 19:16:01 EST 2016
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