Primes p such that f(p), f(f(p)), f(f(f(p))), and f(f(f(f(p)))) are all prime, where f(x) = x^2+3x+1.

A244113

Primes p such that f(p), f(f(p)), f(f(f(p))), and f(f(f(f(p)))) are all prime, where f(x) = x^2+3x+1.

Terms

    a(0) =3a(1) =1628779a(2) =2481113a(3) =3260683a(4) =3520229a(5) =9733123a(6) =10671253a(7) =10673129a(8) =11772809a(9) =36758303a(10) =45459353a(11) =45594019a(12) =58552279a(13) =64597903a(14) =66539353a(15) =74674559a(16) =83471243a(17) =96765313a(18) =115623929a(19) =117479039a(20) =131701183a(21) =133500553a(22) =145010533a(23) =163341319a(24) =163845719a(25) =166410353a(26) =167197243a(27) =169948223

External references