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A082406
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Numbers k such that k divides Sum_{j=1..k} binomial(2j,j).
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1
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1, 2, 5, 8, 11, 12, 17, 23, 29, 41, 47, 53, 59, 71, 83, 89, 101, 107, 113, 130, 131, 137, 149, 167, 173, 179, 191, 196, 197, 227, 233, 238, 239, 251, 257, 263, 266, 269, 281, 293, 311, 317, 322, 347, 353, 359, 383, 389, 401, 419, 431, 443, 449, 461, 467, 479
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OFFSET
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1,2
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LINKS
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FORMULA
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Is a(n) asymptotic to c*n*log(n) with 2 < c < 2.3?
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MATHEMATICA
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Select[Range[500], Divisible[Sum[Binomial[2k, k], {k, #}], #]&] (* Harvey P. Dale, Feb 16 2013 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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