The total length of the sequence when starting from n and creating the smallest unused prime number by either removing or adding a single digit anywhere in the value of the previous number. If the sequence does not terminate, a(n) = -1.
A389927
The total length of the sequence when starting from n and creating the smallest unused prime number by either removing or adding a single digit anywhere in the value of the previous number. If the sequence does not terminate, a(n) = -1.
Terms
- a(0) =17608a(1) =205696a(2) =205694a(3) =17612a(4) =205696a(5) =17614a(6) =200955a(7) =205696a(8) =17621a(9) =17608a(10) =17607a(11) =205697a(12) =17604a(13) =17622a(14) =205697a(15) =17606a(16) =175096a(17) =17609a(18) =17620a(19) =205697a(20) =205697a(21) =205697a(22) =205710a(23) =205697a(24) =205697a(25) =205697a(26) =205697a(27) =205697a(28) =205697a(29) =205695
External references
- oeis: A389927