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A179670
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Products of the 3rd power of a prime and 3 distinct primes (p^3*q*r*s).
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17
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840, 1320, 1560, 1848, 1890, 2040, 2184, 2280, 2760, 2856, 2970, 3080, 3192, 3432, 3480, 3510, 3640, 3720, 3864, 4158, 4440, 4488, 4590, 4760, 4872, 4914, 4920, 5016, 5130, 5160, 5208, 5250, 5304, 5320, 5640, 5720, 5928, 6072, 6210, 6216, 6360, 6426
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OFFSET
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1,1
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COMMENTS
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A050326(a(n)) = 7. - Reinhard Zumkeller, May 03 2013
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LINKS
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T. D. Noe, Table of n, a(n) for n = 1..1000
Will Nicholes, Prime Signatures
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MATHEMATICA
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f[n_]:=Sort[Last/@FactorInteger[n]]=={1, 1, 1, 3}; Select[Range[10000], f]
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CROSSREFS
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Cf. A006881, A007304, A065036, A085986, A085987, A092759, A178739, A179642, A179643, A179644, A179645, A179646, A179664, A179665, A179666, A179667, A179668, A179669.
Sequence in context: A144770 A068546 A033269 * A092002 A169827 A158402
Adjacent sequences: A179667 A179668 A179669 * A179671 A179672 A179673
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, Jul 23 2010
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STATUS
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approved
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