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A154419
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Primes of the form 20n^2+36n+17
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0
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17, 73, 953, 1249, 2377, 2833, 3329, 4441, 8737, 12401, 13417, 15569, 17881, 20353, 21649, 28729, 33457, 36809, 49801, 51817, 62497, 67049, 71761, 74177, 86857, 89513, 100537, 103393, 118273, 121369, 127681, 134153, 144161, 161641, 168913
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Also primes of the form 5k^2+18k+17. (Proof: this format implies that k=2n, even, because otherwise 5k^2+18k+17 is even and cannot be prime. So 5k^2+18k+17=20n^2+36n+17.) [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 12 2009]
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FORMULA
| a(n)=20n^2+36n+17
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EXAMPLE
| For n=0, a(0)=17; n=1, a(1)=73; n=6, a(6)=953
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CROSSREFS
| Cf. A017377, A154418
Sequence in context: A145440 A112013 A165691 * A097223 A063494 A146594
Adjacent sequences: A154416 A154417 A154418 * A154420 A154421 A154422
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KEYWORD
| nonn
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 09 2009
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