Consider the concatenation of n consecutive integers S, S+1, S+2, ..., S+n-1, written in base 2 and then converted to base 10; a(n) gives (in base 10) the first prime reached for any value of S, or -1 if a prime is never reached.

A269710

Consider the concatenation of n consecutive integers S, S+1, S+2, ..., S+n-1, written in base 2 and then converted to base 10; a(n) gives (in base 10) the first prime reached for any value of S, or -1 if a prime is never reached.