Primes whose consecutive digits differ by 4 or 5.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =37a(5) =59a(6) =61a(7) =73a(8) =83a(9) =151a(10) =373a(11) =383a(12) =727a(13) =1627a(14) =3727a(15) =4049a(16) =4051a(17) =4951a(18) =5051a(19) =5059a(20) =6151a(21) =15161a(22) =15959a(23) =16273a(24) =26161a(25) =26261a(26) =37273a(27) =40483a(28) =48383a(29) =61627