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A051547
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a(n) = lcm{ phi(1), ..., phi(n) }, where phi is Euler's totient function A000010.
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4
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1, 1, 2, 2, 4, 4, 12, 12, 12, 12, 60, 60, 60, 60, 120, 120, 240, 240, 720, 720, 720, 720, 7920, 7920, 7920, 7920, 7920, 7920, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 55440, 1275120, 1275120, 1275120
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OFFSET
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1,3
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LINKS
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MATHEMATICA
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PROG
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(PARI) a(n) = lcm(vector(n, k, eulerphi(k))); \\ Michel Marcus, Jul 30 2017
(PARI) apply( A051547(n)=lcm(apply(eulerphi, [2..n])), [1..50]) \\ Defines the function A051547; apply(...) for check & example. - M. F. Hasler, Dec 09 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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