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A217498 Primes of the form 2*n^2 + 58*n + 27. 10
151, 367, 619, 907, 1231, 1987, 2887, 3391, 3931, 4507, 5119, 6451, 7927, 8719, 9547, 11311, 13219, 15271, 17467, 21031, 22291, 24919, 27691, 29131, 32119, 35251, 36871, 41947, 43711, 55051, 59119, 63331, 76831, 81619, 84067, 89071, 94219, 96847, 104947 (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) + 787 is a square. - Vincenzo Librandi, Apr 10 2015

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

MATHEMATICA

Select[Table[2 n^2 + 58 n + 27, {n, 500}], PrimeQ]

PROG

(MAGMA) [a: n in [1..500] | IsPrime(a) where a is 2*n^2+58*n+27];

CROSSREFS

Cf. A054723, A176549, A217494.

Subsequence of A002145.

Sequence in context: A211551 A108842 A078858 * A078967 A089317 A141982

Adjacent sequences:  A217495 A217496 A217497 * A217499 A217500 A217501

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 09 2012

STATUS

approved

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Last modified August 18 04:47 EDT 2022. Contains 356204 sequences. (Running on oeis4.)