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Search: id:A048621
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| A048621 |
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Central value of p(C(n,[ n/2 ])), where p()=A001222 (prime factors with multiple counting) applied to A001405(n). |
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+0
2
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| 0, 1, 1, 2, 2, 3, 2, 3, 4, 5, 4, 5, 5, 6, 5, 6, 5, 6, 5, 6, 7, 8, 6, 7, 8, 9, 10, 11, 10, 11, 8, 9, 10, 11, 10, 11, 11, 12, 11, 12, 11, 12, 11, 12, 14, 15, 12, 13, 13, 14, 14, 15, 13, 14, 13, 14, 15, 16, 14, 15, 15, 16, 14, 15, 15, 16, 15, 16, 16, 17, 14, 15, 15, 16, 17, 18, 18, 19
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OFFSET
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1,4
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FORMULA
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A001222(A001405(n))=a(n)
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EXAMPLE
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n=24: the sums of prime factor exponents when k runs from 0 to 24 is {0,4,4,5,5,7,6,8,6,8,8,9,7,9,8,8,6,8,6,7,5,5,4,4,0}. The central value is 7, so a(24)=7.
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CROSSREFS
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A001222, A001221, A046660, A034973, A034974.
Sequence in context: A106250 A029248 A085916 this_sequence A045772 A091256 A003990
Adjacent sequences: A048618 A048619 A048620 this_sequence A048622 A048623 A048624
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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