a(n) = n*(n+1)^2*(n+2)^3*(n+3)^2*(n+4).

Terms

a(0) =0a(1) =8640a(2) =172800a(3) =1512000a(4) =8467200a(5) =35562240a(6) =121927680a(7) =359251200a(8) =940896000a(9) =2242468800a(10) =4947022080a(11) =10231341120a(12) =20033395200a(13) =37425024000a(14) =67118284800a(15) =116138603520a(16) =194702952960a(17) =317346724800a(18) =504348768000a(19) =783510235200