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A086865
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Numbers n such that 2*10^n+11 is prime.
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1
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0, 1, 2, 3, 4, 9, 19, 25, 39, 63, 133, 157, 274, 943, 1009, 1353, 7297, 16221, 25256, 30424, 52147
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OFFSET
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1,3
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COMMENTS
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a(22) > 10^5. - Robert Price, Jan 10 2015
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LINKS
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Table of n, a(n) for n=1..21.
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MATHEMATICA
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Do[ If[ PrimeQ[2*10^n + 11], Print[n]], {n, 0, 4800}]
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CROSSREFS
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Cf. A081677.
Sequence in context: A014281 A220364 A243902 * A258274 A228126 A192988
Adjacent sequences: A086862 A086863 A086864 * A086866 A086867 A086868
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KEYWORD
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hard,more,nonn
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AUTHOR
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Carl R. White, Aug 20 2003
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EXTENSIONS
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Edited and extended by Robert G. Wilson v, Aug 25 2003
Term a(13) (had been listed as 254) corrected by Jon E. Schoenfield, Jul 13 2010
a(17)-a(21) from Robert Price, Jan 10 2015
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STATUS
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approved
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