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A093717
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Numbers n such that 4^n+3^(n-1) is prime.
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7
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1, 2, 3, 4, 6, 8, 10, 12, 15, 19, 27, 30, 32, 34, 43, 48, 51, 72, 88, 106, 906, 963, 1328, 1336, 1611, 1664, 2680, 3122, 3267
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| 19 is a member since 419+318 = 2388583837526729 which is a prime number.
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MATHEMATICA
| Do[ If[ PrimeQ[4^n + 3^(n - 1)], Print[n]], {n, 5000}]
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CROSSREFS
| Cf. A082103, A093793, A093765, A096185, A093794, A093795, A096186.
Sequence in context: A001972 A005705 A139542 * A002093 A179971 A067069
Adjacent sequences: A093714 A093715 A093716 * A093718 A093719 A093720
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KEYWORD
| nonn
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AUTHOR
| Herman H. Rosenfeld (herm3(AT)pacbell.net), May 17 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 18 2004
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