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

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