If any power of 2 ends with k 2's and 7's, they must be the first k terms of this sequence in reverse order.
A023399
If any power of 2 ends with k 2's and 7's, they must be the first k terms of this sequence in reverse order.
Terms
- a(0) =2a(1) =7a(2) =2a(3) =2a(4) =2a(5) =2a(6) =7a(7) =2a(8) =7a(9) =2a(10) =7a(11) =7a(12) =7a(13) =7a(14) =2a(15) =2a(16) =7a(17) =2a(18) =7a(19) =2a(20) =7a(21) =7a(22) =2a(23) =7a(24) =7a(25) =2a(26) =7a(27) =2a(28) =7a(29) =7
External references
- oeis: A023399