Exponent of least power of 2 having exactly n consecutive 9's in its decimal representation.
A131543
Exponent of least power of 2 having exactly n consecutive 9's in its decimal representation.
Terms
- a(0) =0a(1) =12a(2) =33a(3) =50a(4) =421a(5) =422a(6) =2187a(7) =15554a(8) =42483a(9) =42485a(10) =42486a(11) =1522085a(12) =2662514a(13) =6855863a(14) =6855865
External references
- oeis: A131543