637815097923
domain: N
Appears in sequences
- a(n) = 15*a(n-1) - 15*a(n-2) + a(n-3) with a(0)=1, a(1)=3, and a(2)=33.at n=11A011922
- a(n) = 3*a(n-1) + 3*a(n-2) - a(n-3); a(0) = 1, a(1) = 0, a(2) = 3. a(n) = 4*{a(n-1)+(-1)^n}-a(n-2); a(0) = 1, a(1) = 0.at n=22A120892
- Denominators a(n) of Pythagorean approximations b(n)/a(n) to sqrt(3).at n=20A195499