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A219045
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Numbers k such that 3^k - 26 is prime.
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16
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7, 10, 13, 22, 27, 30, 57, 62, 117, 255, 535, 651, 873, 998, 1502, 18145, 22766, 25770, 43558, 45663, 48058, 62887, 87477, 103585, 115802
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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3^7 - 26 = 2161 (prime), so 7 is in the sequence.
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MATHEMATICA
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Do[If[PrimeQ[3^n - 26], Print[n]], {n, 3, 10000}]
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PROG
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CROSSREFS
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Cf. Sequences of numbers k such that 3^k + m is prime:
(m = 32) A219048, (m = -32) A219049, (m = 34) A219050, (m = -34) A219051. Note that if m is a multiple of 3, 3^k + m is also a multiple of 3 (for k greater than 0), and as such isn't prime.
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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