Primes p such that sigma(p+2)=sigma(p-2).

Terms

a(0) =53a(1) =20543a(2) =47843a(3) =176227a(4) =396953a(5) =471187a(6) =995887a(7) =1083113a(8) =1867253a(9) =5022653a(10) =17449567a(11) =22873583a(12) =32003407a(13) =38673847a(14) =59808803a(15) =96144127a(16) =113561243a(17) =143570873a(18) =164563687a(19) =225835807a(20) =238818893a(21) =272773499a(22) =286557983a(23) =349504957