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Search: id:A145784
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A145784 Numbers with property that the number of prime factors is a multiple of 3. +0
4
1, 8, 12, 18, 20, 27, 28, 30, 42, 44, 45, 50, 52, 63, 64, 66, 68, 70, 75, 76, 78, 92, 96, 98, 99, 102, 105, 110, 114, 116, 117, 124, 125, 130, 138, 144, 147, 148, 153, 154, 160, 164, 165, 170, 171, 172, 174, 175, 182, 186, 188, 190, 195, 207, 212, 216, 222, 224, 230 (list; graph; listen)
OFFSET

1,2

COMMENT

A010872(A001222(a(n))) = 0;

A014612 and A000578 are subsequences.

CROSSREFS

A028260.

Sequence in context: A051144 A067537 A046339 this_sequence A014612 A046369 A066428

Adjacent sequences: A145781 A145782 A145783 this_sequence A145785 A145786 A145787

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 19 2008

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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