Cycle of 2 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.

Terms

a(0) =0a(1) =36a(2) =150a(3) =284a(4) =464a(5) =467a(6) =525a(7) =584a(8) =644a(9) =777a(10) =855a(11) =941a(12) =1058a(13) =1120a(14) =1179a(15) =1362a(16) =1788a(17) =1855a(18) =2368a(19) =2520a(20) =2547a(21) =2550a(22) =2576a(23) =2743a(24) =2988a(25) =3063a(26) =3273a(27) =3339a(28) =3410a(29) =3930