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A174617
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Number of nine-prime Carmichael numbers less than 10^n.
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5
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 27, 170, 1436, 8835, 44993, 196391, 762963, 2714473
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OFFSET
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0,15
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LINKS
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Table of n, a(n) for n=0..21.
R. G. E. Pinch, "The Carmichael numbers up to 10^21", Proceedings of Conference on Algorithmic Number Theory 2007
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EXAMPLE
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n=13, with 9 prime factors, the smallest Carmichael number is : 9746347772161 = 7*11*13*17*19*31*37*41*641.
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CROSSREFS
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Cf. A002997, A132195, A006931, A055553, A174612 - A174616.
Sequence in context: A042418 A042420 A213285 * A055339 A083560 A125337
Adjacent sequences: A174614 A174615 A174616 * A174618 A174619 A174620
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KEYWORD
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nonn
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AUTHOR
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Michel Lagneau, Mar 23 2010
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STATUS
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approved
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