57001
domain: N
Appears in sequences
- a(n) = 3^(n-1) - 2^n.at n=10A003063
- Monotonic ordering of nonnegative differences 9^i-2^j, for 40>= i>=0, j>=0.at n=40A192123
- Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+479)^2 = y^2.at n=9A207075
- Number of ways 1/n can be expressed as the sum of four distinct unit fractions: 1/n = 1/w + 1/x + 1/y + 1/z satisfying 0 < w < x < y < z.at n=29A241883