Column 3 of triangle in A144633.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =-6a(5) =35a(6) =-210a(7) =1225a(8) =-5670a(9) =-5005a(10) =750750a(11) =-16391375a(12) =278528250a(13) =-4130451325a(14) =51941839950a(15) =-429736682375