a(n) = A322248(n)^2, the square of the central coefficient in (1 + 5*x + 16*x^2)^n.
A322249
a(n) = A322248(n)^2, the square of the central coefficient in (1 + 5*x + 16*x^2)^n.
Terms
- a(0) =1a(1) =25a(2) =3249a(3) =366025a(4) =48455521a(5) =6646325625a(6) =947789867025
External references
- oeis: A322249