92730domain: NAppears in sequencesa(0)=1, a(n) = 2*Fibonacci(n+4) - 6.at n=20A063758Central terms of triangle A127082; a(n) = A127082(2*n,n).at n=5A127090Expansion of e.g.f. 1 / (1 - x^4 * exp(x) / 4!).at n=11A346890