38563882

Appears in sequences

• a(n) = F(n+2) - 2^[ (n+1)/2 ] - 2^[ n/2 ] + 1.at n=36A005673
• a(n) = Fibonacci(2*n)-2^n+1.at n=19A047790
• G.f.: x^3*(2*x-1) / ((1-x)*(1-x-x^2)*(1-2*x^2)).at n=38A174959