Primes p such that sopfr(p-1) = sopfr(p+1) is also prime, where sopfr is A001414.

Terms

a(0) =11a(1) =251a(2) =1429a(3) =906949a(4) =1050449a(5) =1058389a(6) =3728113a(7) =9665329a(8) =13623667a(9) =14320489a(10) =30668003a(11) =30910391a(12) =45717377a(13) =49437001a(14) =55544959a(15) =57510911a(16) =58206653a(17) =58772257a(18) =69490901a(19) =72191321a(20) =73625789a(21) =75235973a(22) =79396433a(23) =99673891a(24) =103821169a(25) =104662139a(26) =121322449a(27) =125938889a(28) =147210257a(29) =164810311