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A217499 Primes of the form 2*n^2 + 70*n + 33. 10
181, 433, 1801, 4933, 5581, 7741, 13033, 18433, 24733, 41761, 47161, 49033, 94033, 96661, 104761, 140401, 156781, 174061, 188533, 207433, 227233, 252181, 265141, 370081, 385741, 412561, 423541, 440281, 451621, 510481, 535033, 572941, 598933, 659521, 666433 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Conjecture: 2^a(n)-1 is not prime; in other words, these primes are included in A054723.
2*a(n) + 1159 is a square. - Vincenzo Librandi, Apr 10 2015
LINKS
MATHEMATICA
Select[Table[2 n^2 + 70 n + 33, {n, 600}], PrimeQ]
PROG
(Magma) [a: n in [1..600] | IsPrime(a) where a is 2*n^2+70*n+33];
CROSSREFS
Subsequence of A002144.
Sequence in context: A082444 A108847 A063360 * A113156 A142391 A142552
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Oct 09 2012
STATUS
approved

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Last modified May 19 00:35 EDT 2024. Contains 372666 sequences. (Running on oeis4.)