Exponent of least power of 2 having exactly n consecutive 5's in its decimal representation.
A131539
Exponent of least power of 2 having exactly n consecutive 5's in its decimal representation.
Terms
- a(0) =0a(1) =8a(2) =16a(3) =76a(4) =41a(5) =1162a(6) =973a(7) =6838a(8) =25265a(9) =81782a(10) =456686a(11) =279270a(12) =1727606a(13) =6030753a(14) =23157026a(15) =106892455
External references
- oeis: A131539