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A154276 Primes of the form 81*n^2 - 72*n + 17. 4
17, 197, 30977, 52901, 80657, 215297, 287297, 414737, 462401, 512657, 739601, 902501, 972197, 1008017, 1196837, 1401857, 1623077, 2496401, 2611457, 3422501, 3763601, 4343057, 4494401, 4726277, 4884101, 5456897, 5541317, 6330257 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes in A154277.

LINKS

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

MAPLE

a := proc (n) if isprime(81*n^2-72*n+17) = true then 81*n^2-72*n+17 else end if end proc: seq(a(n), n = 0 .. 300); # Emeric Deutsch, Jan 20 2009

MATHEMATICA

lst={}; Do[If[PrimeQ[p=81*n^2-72*n+17], AppendTo[lst, p]], {n, 0, 7!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jan 11 2009 *)

Select[Table[81*n^2-72*n+17, {n, 0, 2000}], PrimeQ] (* Vincenzo Librandi, Jul 16 2012

PROG

(MAGMA) [a: n in [0..350] | IsPrime(a) where a is 81*n^2-72*n+17]; // Vincenzo Librandi, Jul 16 2012

CROSSREFS

Cf. A154277.

Sequence in context: A177135 A130817 A055432 * A021379 A177075 A177076

Adjacent sequences:  A154273 A154274 A154275 * A154277 A154278 A154279

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jan 06 2009

EXTENSIONS

Extended by Emeric Deutsch, Jan 20 2009

STATUS

approved

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Last modified January 28 00:32 EST 2020. Contains 331313 sequences. (Running on oeis4.)