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A154505
Sophie Germain primes of A144571.
0
1601, 240101, 1464101, 2755601, 6100901, 72250001, 75342401, 139948901, 281568401, 284596901, 325441601, 351937601, 655360001, 683299601, 702250001, 1479940901, 1621672901, 1830984101, 2168764901, 2219352101, 2544193601
OFFSET
1,1
MATHEMATICA
lst={}; Do[If[PrimeQ[p=81*n^2-90*n+26], If[PrimeQ[2*p+1], AppendTo[lst, p]]], {n, 8!}]; lst
Select[Table[81 n^2-90 n+26, {n, 6000}], AllTrue[{#, 2#+1}, PrimeQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 09 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved