a(n) = 4^n * P(2*n, n), where P(n, x) is n-th Legendre polynomial.

A349077

a(n) = 4^n * P(2*n, n), where P(n, x) is n-th Legendre polynomial.

Terms

    a(0) =1a(1) =4a(2) =886a(3) =575296a(4) =748553926

External references