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Search: id:A048197
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| A048197 |
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Numbers n for which binomial [ n, Floor [ n/2 ] ] has more unitary than non-unitary divisors. |
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+0
1
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| 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 23, 24, 31, 32, 35, 39, 41, 43, 55
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OFFSET
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1,2
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COMMENT
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A048107 is applied to central binomial coefficients. This sequence includes the 12 known square-free central binomial coefficients i.e. 1,2,3,4,5,7,8,11,17,19,23,71 collected in A046098
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FORMULA
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A034444[ A001405[ n ] ] > A048105[ A001405[ n ] ]
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EXAMPLE
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n=59 when the corresponding binomial[ 59,29 ] has 8192 divisors, of which 4096 are unitary and equally 4096 are not such ones.
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CROSSREFS
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A001405, A034444, A048107, A046098.
Sequence in context: A030700 A105208 A074779 this_sequence A073491 A066311 A069899
Adjacent sequences: A048194 A048195 A048196 this_sequence A048198 A048199 A048200
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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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