1773314929
domain: N
Appears in sequences
- Expansion of (1-x)^2/(1 - 4*x + 3*x^2 - x^3).at n=19A052544
- Expansion of (1 - x)/(1 + x - 2*x^2 + x^3).at n=28A078039
- a(0) = 0, a(1) = 1, a(2) = 2; for n > 2, a(n) = a(n-1) + 2*a(n-2) + a(n-3).at n=29A141015
- a(n) = Sum_{k=1..n} b(k)*a(n - k) for n >= 1, where b(n) = b(n-2) + b(n-3) for n >= 3 with b(0) = 0 and b(1) = b(2) = 1.at n=29A141683
- 1 followed by A141015.at n=30A142474
- INVERT transform of [1, 0, 1, 3, 9, 27, 81, ...].at n=20A204200