Least exponent k such that 3^k has exactly n consecutive 4's in its decimal representation.
A131549
Least exponent k such that 3^k has exactly n consecutive 4's in its decimal representation.
Terms
- a(0) =5a(1) =12a(2) =55a(3) =308a(4) =510a(5) =2340a(6) =7286a(7) =9670a(8) =125406a(9) =222961a(10) =847169a(11) =639226a(12) =6250771a(13) =14929721
External references
- oeis: A131549