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A125245
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Numbers n such that binomial(6n, n) + 1 is prime.
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5
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1, 2, 4, 10, 15, 98, 111, 118, 236, 280, 512, 1284, 1303, 1818, 2525, 2692, 4620, 8405
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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MATHEMATICA
| Do[f=Binomial[6n, n]+1; If[PrimeQ[f], Print[n]], {n, 1, 1000}]
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CROSSREFS
| Cf. A125244 = numbers n such that binomial(6n, n) - 1 is prime. Cf. A066699 = numbers n such that binomial(2n, n) + 1 is prime. Cf. A066726 = numbers n such that binomial(2n, n) - 1 is prime. Cf. A125220, A125221, A125240, A125241, A125242, A125243.
Sequence in context: A064513 A058201 A000947 * A096689 A039682 A189558
Adjacent sequences: A125242 A125243 A125244 * A125246 A125247 A125248
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KEYWORD
| hard,more,nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Nov 25 2006
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EXTENSIONS
| More terms from Ryan Propper (rpropper(AT)stanford.edu), Mar 28 2007
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