[seqfan] Sequence inspired by the Punch-22 puzzle

[Bob Lyons]

Hello SeqFans,

I spent way too much time during the holidays trying to solve the Punch-22
puzzle:

  http://realmode.com/punch22.html

I could not solve the puzzle or prove that it's unsolvable.
However, it did inspire me to submit the following sequence:

  https://oeis.org/draft/A253426 - Reusable Paper Tape Numbers: Maximum
number of symbols that can be encoded on an n-hole paper tape, such that a
used paper tape can always be reused at least once.

Any comments are welcome.

Thanks,

Bob