Central terms of triangle A291560: a(n) = A291560(2*n-1,n) for n>=1.

A291562

Central terms of triangle A291560: a(n) = A291560(2*n-1,n) for n>=1.

Terms

    a(0) =1a(1) =-10a(2) =8694a(3) =-61647300

External references