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A093793
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Numbers n such that 5^n+4^(n-1) is prime.
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7
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OFFSET
| 1,1
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EXAMPLE
| 22 is a member since 522+421 = 2388583837526729 which is a prime number.
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MATHEMATICA
| Do[ If[ PrimeQ[5^n + 4^(n - 1)], Print[n]], {n, 5000}]
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CROSSREFS
| Cf. A082103, A093717, A093765, A096185, A093794, A093795, A096186.
Sequence in context: A049526 A187251 A193763 * A087959 A006871 A180389
Adjacent sequences: A093790 A093791 A093792 * A093794 A093795 A093796
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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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