A023400 - OEIS

A023400

If any power of 2 ends with k 2's and 9's, they must be the first k terms of this sequence in reverse order.

2, 9, 9, 2, 9, 2, 2, 2, 2, 2, 2, 9, 9, 2, 9, 9, 9, 9, 2, 2, 9, 2, 9, 2, 9, 2, 2, 9, 2, 2, 9, 2, 2, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 9, 2, 2, 9, 9, 2, 9, 9, 9, 9, 9, 2, 9, 2, 9, 2, 2, 9, 9, 9, 2, 2, 9, 9, 9, 2, 9, 2, 2, 2, 2, 9, 9, 9, 9, 9, 9, 9, 9, 2, 9, 2, 9, 2, 2, 2, 9, 9, 2, 2, 2, 9, 9, 2, 9, 9, 2, 9, 9, 9, 2, 2, 9, 9