It's the sequence of n such that 2^n doesn't contain the digit 0. This excludes 10 (1024), 11 (2048), and 12 (4096). See http://oeis.org/A007377 http://oeis.org

It's the sequence of n such that 2^n doesn't contain the digit 0. This excludes 10 (1024), 11 (2048), and 12 (4096). See http://oeis.org/A007377 http://oeis.org/A007377