If any power of 2 ends with k 4's and 9's, they must be the first k terms of this sequence in reverse order.
A023405
If any power of 2 ends with k 4's and 9's, they must be the first k terms of this sequence in reverse order.
Terms
- a(0) =4a(1) =4a(2) =9a(3) =4a(4) =9a(5) =9a(6) =4a(7) =9a(8) =4a(9) =9a(10) =4a(11) =4a(12) =9a(13) =9a(14) =4a(15) =9a(16) =4a(17) =9a(18) =9a(19) =9a(20) =4a(21) =4a(22) =4a(23) =4a(24) =9a(25) =4a(26) =4a(27) =4a(28) =4a(29) =9
External references
- oeis: A023405