Write down the positive integers. To obtain the terms of the sequence, concatenate groups of these so that the last number of each concatenated group is a prime.

A367431

Write down the positive integers. To obtain the terms of the sequence, concatenate groups of these so that the last number of each concatenated group is a prime.

Terms

    a(0) =12a(1) =3a(2) =45a(3) =67a(4) =891011a(5) =1213a(6) =14151617a(7) =1819a(8) =20212223a(9) =242526272829a(10) =3031a(11) =323334353637a(12) =38394041a(13) =4243a(14) =44454647a(15) =484950515253a(16) =545556575859a(17) =6061a(18) =626364656667a(19) =68697071a(20) =7273a(21) =747576777879a(22) =80818283a(23) =848586878889a(25) =9899100101a(26) =102103

External references