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Search: id:A072978
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| A072978 |
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Numbers of the form m*2^Omega(m), where m>1 is odd and Omega(m)=A001222(m), the number of prime factors of m. |
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+0
3
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| 1, 6, 10, 14, 22, 26, 34, 36, 38, 46, 58, 60, 62, 74, 82, 84, 86, 94, 100, 106, 118, 122, 132, 134, 140, 142, 146, 156, 158, 166, 178, 194, 196, 202, 204, 206, 214, 216, 218, 220, 226, 228, 254, 260, 262, 274, 276, 278, 298, 302, 308, 314, 326, 334, 340, 346
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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(number of odd prime factors)=(number of even prime factors).
A007814(a(n)) = A087436(a(n)); A000400, A011557, A001023, A001024, A009965, A009966, and A009975 are subsequences. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 06 2008
Subsequence of A028260. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 20 2008]
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LINKS
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R. Zumkeller, Table of n, a(n) for n = 1..10000
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CROSSREFS
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Adjacent sequences: A072975 A072976 A072977 this_sequence A072979 A072980 A072981
Sequence in context: A068014 A057885 A015812 this_sequence A080784 A055163 A119431
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KEYWORD
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nonn,nice,new
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 20 2002
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