Exponent of least power of 2 having exactly n consecutive 4's in its decimal representation.
A131538
Exponent of least power of 2 having exactly n consecutive 4's in its decimal representation.
Terms
- a(0) =0a(1) =2a(2) =18a(3) =44a(4) =192a(5) =315a(6) =3396a(7) =8556a(8) =13327a(9) =81785a(10) =279267a(11) =865357a(12) =1799674a(13) =1727603a(14) =8760851a(15) =63416791a(16) =106892452
External references
- oeis: A131538