A153424 - OEIS

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A153424

Primes of the form k^2+3*k+223.

223, 227, 233, 241, 251, 263, 277, 293, 311, 331, 353, 431, 461, 563, 601, 641, 683, 727, 773, 821, 977, 1033, 1091, 1151, 1213, 1277, 1481, 1553, 1627, 1861, 2027, 2113, 2383, 2477, 2671, 3083, 3191, 3301, 3413, 3527, 3643, 3761, 3881, 4003, 4127, 4253

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Table[n^2+3*n+223, {n, 0, 70}], PrimeQ] (* Vincenzo Librandi, Jul 14 2012 *)

PROG

(Magma) [a: n in [0..50] | IsPrime(a) where a is n^2+3*n+223 ]; // Vincenzo Librandi, Jul 14 2012

CROSSREFS

Cf. A153423.

Sequence in context: A178551 A105982 A243766 * A378081 A100607 A092623

Adjacent sequences: A153421 A153422 A153423 * A153425 A153426 A153427

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 26 2008

STATUS

approved