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A120491
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Numbers n such that 22*3^n + 1 is prime.
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0
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0, 1, 2, 4, 5, 10, 12, 14, 24, 34, 37, 52, 56, 65, 68, 96, 106, 128, 156, 169, 236, 254, 481, 618, 641, 672, 700, 774, 1274, 1625, 1841
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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EXAMPLE
| If n=96 then 22*3^n + 1 is a prime with 48 digits.
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MATHEMATICA
| Select[Range[0, 2000], PrimeQ[22*3^# + 1] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Aug 06 2006
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PROG
| (MAGMA) [ n: n in [0..3000] | IsPrime(22*3^n + 1) ] [From Vincenzo Librandi, Jan 31 2011]
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CROSSREFS
| Cf. A003306.
Sequence in context: A022770 A141481 A047611 * A177186 A022944 A133732
Adjacent sequences: A120488 A120489 A120490 * A120492 A120493 A120494
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Aug 04 2006
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EXTENSIONS
| More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Aug 06 2006
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