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A338943
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a(n) is the least number k such that the average number of distinct prime divisors of {1..k} is >= n.
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5
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OFFSET
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0,2
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COMMENTS
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10^18 < a(4) < 10^19. - Daniel Suteu, Nov 17 2020
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LINKS
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Table of n, a(n) for n=0..3.
Chris K. Caldwell and G. L. Honaker, Jr., Prime Curio for 455
Eric Weisstein's World of Mathematics, Distinct Prime Factors.
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EXAMPLE
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a(2) = 455 because the average number of distinct prime divisors of {1..455} is >= 2.
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CROSSREFS
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Cf. A001221, A013939, A085829, A328331, A338891.
Sequence in context: A187514 A258873 A244195 * A232593 A267082 A051735
Adjacent sequences: A338940 A338941 A338942 * A338944 A338945 A338946
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KEYWORD
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nonn,more
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AUTHOR
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Ilya Gutkovskiy, Nov 17 2020
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STATUS
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approved
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