a(n) = 2*(n-1)^6*(n+1)^2*(n^2+10*n+1).

Terms

a(0) =2a(1) =0a(2) =450a(3) =81920a(4) =2077650a(5) =22413312a(6) =148531250a(7) =716636160a(8) =2763575010a(9) =9017753600a(10) =25850353122a(11) =66816000000a(12) =158678718770a(13) =351151718400a(14) =731985584850