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A075592
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Numbers n such that number of prime divisors of n is a divisor of n.
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1
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2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 36, 37, 38, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 52, 53, 54, 56, 58, 59, 60, 61, 62, 64, 66, 67, 68, 71, 72, 73, 74, 76, 78, 79, 80, 81, 82, 83, 84, 86, 88, 89, 90
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Select[Range[2, 100], Divisible[#, Length[Select[Divisors[#], PrimeQ]]]&] (* From Harvey P. Dale, Mar 17 2011 *)
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CROSSREFS
| Different from A070776: 78 belongs to this sequence but not to A070776.
Sequence in context: A080944 A095736 A004829 * A070776 A076564 A179892
Adjacent sequences: A075589 A075590 A075591 * A075593 A075594 A075595
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KEYWORD
| easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 26 2002
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EXTENSIONS
| More terms from David Wasserman (dwasserm(AT)earthlink.net), Jan 20 2005
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