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Search: id:A080387
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| A080387 |
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Numbers n such that the number of k for which the C[n,Floor(n/2)]/C[n,k] quotient is an integer equals ten; i.e. A080383(n)=10. |
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2
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| 13, 31, 41, 57, 85, 91, 133, 155, 177, 183, 209, 221, 253, 281, 307, 313, 341, 375, 381, 409, 419, 441, 457, 463, 477, 481, 533, 553, 599, 617, 625, 631, 645, 651, 661, 691, 737, 757, 829, 841, 859, 871, 881, 885, 901, 919, 929, 937, 953, 967, 987, 993
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OFFSET
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1,1
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EXAMPLE
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for n=13:the central binomial coefficient(=1716) is divisible by 10 C[13,k] b,coefficients; the 4 non-divisible cases are as follows: C[13,4],C[13,5],C[13,8],C[13,9].
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CROSSREFS
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Cf. A001405, A080383-A080388.
Sequence in context: A040086 A023274 A129864 this_sequence A097443 A100589 A111489
Adjacent sequences: A080384 A080385 A080386 this_sequence A080388 A080389 A080390
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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), Mar 12 2003
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