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 A172421 Numbers c which have measure of smoothness J bigger than 6. Where J=Log[c]/Log[N(c)], where N(c) is product of distinct prime divisors of c 1
 128, 256, 512, 1024, 2048, 2187, 4096, 6561, 8192, 16384, 19683, 32768, 49152, 52488, 55296, 59049, 62208, 65536, 69984, 73728, 78125, 78732, 82944, 93312, 98304, 104976, 110592, 118098, 124416, 131072, 139968, 147456, 157464, 165888 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence is subset of A049094 and A172418 and A172419 and A172420. LINKS MATHEMATICA aa = {}; Do[kk = FactorInteger[c]; nn = 1; Do[nn = nn*kk[[n]][[1]], {n, 1, Length[kk]}]; If[Log[c]/Log[nn] > 6, AppendTo[aa, c]], {c, 2, 10000}]; aa (*Artur Jasinski*) CROSSREFS Sequence in context: A046308 A110290 A045028 * A045053 A114804 A086059 Adjacent sequences:  A172418 A172419 A172420 * A172422 A172423 A172424 KEYWORD nonn AUTHOR Artur Jasinski, Feb 02 2010 STATUS approved

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