Primes in which neighboring digits differ at most by 1.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =23a(6) =43a(7) =67a(8) =89a(9) =101a(10) =109a(11) =211a(12) =223a(13) =233a(14) =433a(15) =443a(16) =677a(17) =787a(18) =877a(19) =887a(20) =1009a(21) =1109a(22) =1123a(23) =1223a(24) =2111a(25) =2221a(26) =2333a(27) =3221a(28) =3323a(29) =3343