The final prime number in the base n sequence when starting from 2 and creating the smallest unused prime number, when read in base n, by either removing or changing or adding a single digit, from 0 to n-1, anywhere in the base n value of the previous number. If the base n sequence does not terminate, a(n) = -1.

A390367

The final prime number in the base n sequence when starting from 2 and creating the smallest unused prime number, when read in base n, by either removing or changing or adding a single digit, from 0 to n-1, anywhere in the base n value of the previous number. If the base n sequence does not terminate, a(n) = -1.