a(n) = 15*(n+1)*binomial(n+3,10).

Terms

a(0) =120a(1) =1485a(2) =9900a(3) =47190a(4) =180180a(5) =585585a(6) =1681680a(7) =4375800a(8) =10501920a(9) =23556390a(10) =49884120a(11) =100524060a(12) =193993800a(13) =360380790a(14) =647214480a(15) =1127722200a(16) =1912224600a(17) =3163606875a(18) =5118012900a(19) =8112154050a(20) =12618906300a(21) =19293191775a(22) =29030508000a(23) =43040883600a(24) =62941507200