Cycle of 3 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.

Terms

a(0) =467a(1) =941a(2) =8834a(3) =9548a(4) =13012a(5) =22302a(6) =23592a(7) =26208a(8) =47538a(9) =58578a(10) =78910a(11) =86447a(12) =86925a(13) =116230a(14) =118040a(15) =123716a(16) =128055a(17) =213493a(18) =234146a(19) =238326a(20) =273057a(21) =285315a(22) =286422a(23) =389336a(24) =399261a(25) =457810a(26) =468764a(27) =481476a(28) =502590a(29) =525402