Column 1 of triangle in A144633.

Terms

a(0) =0a(1) =1a(2) =-1a(3) =2a(4) =-5a(5) =10a(6) =35a(7) =-910a(8) =11935a(9) =-134750a(10) =1376375a(11) =-11761750a(12) =48923875a(13) =1209057850a(14) =-48943019125