a(n) = C(n+5,5) * C(n+7,7).

Terms

a(0) =1a(1) =48a(2) =756a(3) =6720a(4) =41580a(5) =199584a(6) =792792a(7) =2718144a(8) =8281845a(9) =22902880a(10) =58402344a(11) =139007232a(12) =311800944a(13) =664191360a(14) =1352103840a(15) =2644114176a(16) =4988699793a(17) =9114302736a(18) =16175074300a(19) =27959131200a(20) =47181033900a(21) =77886151200a(22) =126001769400a(23) =200078424000a(24) =312275179125