384377665

Appears in sequences

• Expansion of (1-x)^3/(1 - 4*x + 3*x^2 - x^3).at n=18A052529
• Expansion of (1 - x)/(1 + x - 2*x^2 + x^3).at n=26A078039
• 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=27A141015
• 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=27A141683
• 1 followed by A141015.at n=28A142474