a(n) = n!*LaguerreL(n, -3*n).

A277392

a(n) = n!*LaguerreL(n, -3*n).

Terms

    a(0) =1a(1) =4a(2) =62a(3) =1626a(4) =59928a(5) =2844120a(6) =165100752a(7) =11331597942a(8) =897635712384

External references