Primes p such that there is prime q with sigma(q+2) = p.

Terms

a(0) =7a(1) =13a(2) =31a(3) =1093a(4) =2801a(5) =5113a(6) =8011a(7) =17293a(8) =30103a(9) =30941a(10) =86143a(11) =459007a(12) =552793a(13) =579883a(14) =732541a(15) =1191373a(16) =3500201a(17) =3730693a(18) =4534771a(19) =5168803a(20) =5333791a(21) =7450171a(22) =10378063a(23) =25646167a(24) =25882657a(25) =28792661a(26) =30266503a(27) =43553401a(28) =48037081a(29) =52265671