199716

Appears in sequences

• a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = [ (n+1)/2 ], s = (Fibonacci numbers), t = (Lucas numbers).at n=20A024459
• a(n) = 2*f(2*n)/(f(n)*f(n+2)) where f = A003266.at n=5A372949