a(1)=1; thereafter each term is the concatenation of consecutive numbers, without repetition, and is coprime to all earlier terms.
A271631
a(1)=1; thereafter each term is the concatenation of consecutive numbers, without repetition, and is coprime to all earlier terms.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4567a(4) =89a(5) =10111213a(6) =1415a(7) =16171819a(8) =2021a(10) =3233a(11) =34353637a(12) =3839a(13) =40414243a(16) =6263a(17) =64656667a(18) =6869a(20) =8081a(22) =9293a(24) =104105106107
External references
- oeis: A271631