So I typed a couple of digits into OEIS, which returned http://oeis.org/A080847, "mu(n) + 2", where mu is the https://en.wikipedia.org/wiki/M%C3%B6bius_function

This doesn't appear to be true for arbitrarily many digits, and I'm struggling to see how the two fields may even be connected. Some properties appear similar, eg. the Möbius function, too, appears to sum up to 0.