a(n) is the number of different ways of concatenating the numbers {3^k, k=0,...,n} so as to produce a prime number.
A246718
a(n) is the number of different ways of concatenating the numbers {3^k, k=0,...,n} so as to produce a prime number.
Terms
- a(0) =2a(1) =2a(2) =3a(3) =44a(4) =128a(5) =619a(6) =4134a(7) =28628a(8) =229132a(9) =2107538a(10) =21438790a(11) =238754555
External references
- oeis: A246718