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A219042
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Numbers k such that 3^k + 22 is prime.
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16
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2, 4, 6, 14, 24, 35, 79, 178, 186, 230, 328, 494, 664, 839, 1103, 1678, 2074, 3096, 5150, 6948, 9919, 13655, 19483, 22927, 39991, 54551, 67687, 76655, 90151, 175250, 179120
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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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3^2 + 22 = 31 (prime), so 2 is in the sequence.
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MATHEMATICA
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Do[If[PrimeQ[3^n + 22], Print[n]], {n, 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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