44717400
domain: N
Appears in sequences
- Euler totient function (A000010) of 2^n - 1.at n=25A053287
- Number of ways to place 4 nonattacking bishops on an n X n toroidal board.at n=14A177757
- Number of non-attacking placements of 4 rooks on an n X n board.at n=14A179059
- a(n) = phi(4^n-1), where phi is Euler's totient function (A000010).at n=12A295501