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 A243890 Primes of the form 2*n^2+38*n+17. 2
 101, 149, 257, 317, 449, 521, 677, 761, 941, 1697, 1949, 2081, 2357, 2801, 2957, 3449, 3797, 4349, 4937, 6221, 6449, 6917, 7649, 7901, 8681, 9221, 9497, 10061, 10937, 12161, 13121, 13781, 15149, 16217, 17321, 18077, 18461, 20441, 20849, 25601, 26981, 27449 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Subsequence of A040117. Conjecture: except 521, 2^a(n)-1 is not prime; in other words, these primes are included in A054723. 2*a(n) + 327 is a square. - Vincenzo Librandi, Jun 29 2016 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Table[2 n^2 + 38 n + 17, {n, 800}], PrimeQ] PROG (Magma) [a: n in [1..200] | IsPrime(a) where a is 2*n^2+38*n+17]; CROSSREFS Cf. A040117. Cf. similar sequences listed in A243888. Sequence in context: A141871 A238503 A050806 * A129563 A141927 A243365 Adjacent sequences: A243887 A243888 A243889 * A243891 A243892 A243893 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Jun 16 2014 STATUS approved

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Last modified May 29 15:02 EDT 2023. Contains 363042 sequences. (Running on oeis4.)