(n-1)-st elementary symmetric function of the first n terms of (1,3,9,27,...)=A000244.

A203197

(n-1)-st elementary symmetric function of the first n terms of (1,3,9,27,...)=A000244.

Terms

    a(0) =1a(1) =4a(2) =39a(3) =1080a(4) =88209a(5) =21493836a(6) =15683355351

External references