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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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1
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 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
| Cf. A001405, A080383-A080388.
Sequence in context: A176181 A023274 A129864 * A097443 A100589 A111489
Adjacent sequences: A080384 A080385 A080386 * A080388 A080389 A080390
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Mar 12 2003
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