a(n) = determinant of the n X n matrix m(i,j)=(i+j+3)!/i!/j!.

A105188

a(n) = determinant of the n X n matrix m(i,j)=(i+j+3)!/i!/j!.

Terms

    a(0) =1a(1) =120a(2) =21600a(3) =6048000a(4) =2540160000

External references