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Search: id:A062761
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| A062761 |
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Number of powerful numbers between 2^(n-1)+1 and 2^n. |
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+0
1
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| 1, 0, 1, 1, 2, 3, 3, 7, 8, 12, 17, 25, 36, 50, 74, 105, 152, 213, 306
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OFFSET
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0,5
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FORMULA
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Number of terms x from A001694 for which A029837(x)=n.
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EXAMPLE
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64 < {72,81,100,108,121,125,128} <= 128. i.e. 7 powerful numbers are between 2^6 and 2^7, so a(7)=7.
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CROSSREFS
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Cf. A001694, A029837, A036380, A036386.
Sequence in context: A063670 A143444 A108346 this_sequence A117524 A045683 A157531
Adjacent sequences: A062758 A062759 A062760 this_sequence A062762 A062763 A062764
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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), Jul 16 2001
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