Central coefficients in (1 + 2^n*x + x^2)^n.
A188202
Central coefficients in (1 + 2^n*x + x^2)^n.
Terms
- a(0) =1a(1) =2a(2) =18a(3) =560a(4) =68614a(5) =34210752a(6) =69223161876
External references
- oeis: A188202
A188202
Central coefficients in (1 + 2^n*x + x^2)^n.