689910

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)} A026637(n-k, k).at n=28A026647
• Expansion of 3*x/(1 - 2*x^2 - 2*x + x^3).at n=14A120718
• a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 0, a(1) = 1, a(2) = 0, a(3) = 2.at n=30A295681
• a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 0, a(1) = 2, a(2) = 0, a(3) = 1.at n=30A295682
• a(n) = F(n)*F(n+1) mod L(n+2) where F=A000045 is the Fibonacci numbers and L = A000032 is the Lucas numbers.at n=27A348592