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A174175
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Numbers n such that 10^n + 2*n - 1 is prime.
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2
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1, 2, 4, 10, 20, 35, 91, 112, 116, 325, 367, 674, 2440, 14099, 38315, 47989
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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PROG
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(Magma) /* The code gives only the terms up to 367: */ [n: n in [1..500] | IsPrime(10^n+2*n-1)];
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CROSSREFS
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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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