Denominator of (n+3) / ((n+2) * (n+1) * n).

Terms

a(0) =3a(1) =24a(2) =10a(3) =120a(4) =105a(5) =112a(6) =252a(7) =720a(8) =165a(9) =1320a(10) =858a(11) =728a(12) =1365a(13) =3360a(14) =680a(15) =4896a(16) =2907a(17) =2280a(18) =3990a(19) =9240a(20) =1771a(21) =12144a(22) =6900a(23) =5200a(24) =8775a(25) =19656a(26) =3654a(27) =24360a(28) =13485a(29) =9920