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A243889
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Primes of the form 2*n^2+30*n+13.
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2
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661, 1201, 2281, 2713, 3181, 4801, 5413, 8221, 9013, 12541, 13513, 17761, 18913, 20101, 32413, 33961, 38821, 51421, 72481, 91921, 94513, 108013, 110821, 134581, 137713, 153913, 167521, 211801, 223681, 265621, 274441, 335281, 345181, 365413, 370561, 440761, 560641
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OFFSET
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1,1
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COMMENTS
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Conjecture: except 2281, 2^a(n)-1 is not prime; in other words, these primes are included in A054723.
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LINKS
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MATHEMATICA
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Select[Table[2 n^2 + 30 n + 13, {n, 1000}], PrimeQ]
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PROG
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(Magma) [a: n in [1..800] | IsPrime(a) where a is 2*n^2+30*n+13];
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CROSSREFS
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Cf. similar sequences listed in A243888.
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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