Numbers k such that pi(k).pi(k-1) ... pi(3).pi(2) is prime (dot between numbers means concatenation).
A099078
Numbers k such that pi(k).pi(k-1) ... pi(3).pi(2) is prime (dot between numbers means concatenation).
Terms
- a(0) =5a(1) =22a(2) =48a(3) =317a(4) =734a(5) =5235a(6) =12377
External references
- oeis: A099078