A transform of C(n,2).

Terms

a(0) =0a(1) =0a(2) =1a(3) =12a(4) =102a(5) =760a(6) =5295a(7) =35364a(8) =228956a(9) =1445616a(10) =8936685a(11) =54252220a(12) =324214242a(13) =1911205608a(14) =11132579003a(15) =64170616020a(16) =366497915640