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A125706
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Numbers n such that 6^n + 3^n + 2^n = A074528(n) is a prime.
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1
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0, 1, 3, 9, 13, 25, 27, 29, 95, 107, 153, 159, 675, 1633, 1693, 2337, 25998
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Corresponding primes of the form 6^n + 3^n + 2^n are {3, 11, 251, 10097891, 13062296531, 28430288877251865251, 1023490376703200952251, 36845653355419807219091, 84017312692910353150294530243640676594723260464784043666542128557055486251, ...}.
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MATHEMATICA
| Do[f=6^n+3^n+2^n; If[PrimeQ[f], Print[{n, f}]], {n, 1, 675}]
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CROSSREFS
| Cf. A074528.
Sequence in context: A022408 A126827 A106402 * A113510 A163795 A079994
Adjacent sequences: A125703 A125704 A125705 * A125707 A125708 A125709
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KEYWORD
| hard,more,nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Jan 31 2007
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EXTENSIONS
| More terms from Ryan Propper (rpropper(AT)stanford.edu), Mar 30 2007
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