a(n) is the first number that starts a sequence of exactly n primes x(1), ..., x(n) where x(i+1) = A004093(x(i)) is the digit reversal of 2 * x(i).
A373765
a(n) is the first number that starts a sequence of exactly n primes x(1), ..., x(n) where x(i+1) = A004093(x(i)) is the digit reversal of 2 * x(i).
Terms
- a(0) =2a(1) =7a(2) =19a(3) =487a(4) =1637a(5) =389047
External references
- oeis: A373765