OFFSET
1,1
COMMENTS
Subsequence of A057325.
LINKS
Pierre CAMI, Table of n, a(n) for n = 1..62
MATHEMATICA
pqQ[p_]:=AllTrue[Rest[NestList[#^2+#-1&, p, 4]], PrimeQ]; Select[Prime[ Range[ 16232600]], pqQ] (* Harvey P. Dale, Oct 16 2021 *)
PROG
(PARI) is(n)=for(k=1, 5, if(!isprime(n), return(0)); n=n^2+n-1); 1 \\ Charles R Greathouse IV, Sep 13 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Sep 13 2013
STATUS
approved