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A172418
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Numbers c which have measure of smoothness J bigger than 3. Where J=Log[c]/Log[N(c)], where N(c) is product of distinct prime divisors of c
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5
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16, 32, 64, 81, 128, 243, 256, 288, 324, 384, 432, 486, 512, 576, 625, 648, 729, 768, 864, 972, 1024, 1152, 1250, 1280, 1296, 1458, 1536, 1600, 1728, 1944, 2000, 2048, 2187, 2304, 2401, 2500, 2560, 2592, 2916, 3072, 3125, 3136, 3200, 3456, 3584, 3645
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OFFSET
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1,1
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COMMENTS
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This sequence is subset of A049094.
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LINKS
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Table of n, a(n) for n=1..46.
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MAPLE
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aa = {}; Do[kk = FactorInteger[c]; nn = 1; Do[nn = nn*kk[[n]][[1]], {n, 1, Length[kk]}]; If[Log[c]/Log[nn] > 3, AppendTo[aa, c]], {c, 2, 10000}]; aa (*Artur Jasinski*)
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CROSSREFS
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A049094, A172418-A172422.
Sequence in context: A224544 A204645 A018923 * A036967 A076468 A197917
Adjacent sequences: A172415 A172416 A172417 * A172419 A172420 A172421
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski, Feb 02 2010
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STATUS
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approved
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