a(n) = binomial(n+4,4) * binomial(n+9,4).

Terms

a(0) =126a(1) =1050a(2) =4950a(3) =17325a(4) =50050a(5) =126126a(6) =286650a(7) =600600a(8) =1178100a(9) =2187900a(10) =3879876a(11) =6613425a(12) =10892700a(13) =17409700a(14) =27096300a(15) =41186376a(16) =61289250a(17) =89475750a(18) =128378250a(19) =181306125a(20) =252378126a(21) =346673250a(22) =470401750a(23) =631098000a(24) =837837000a(25) =1101476376a(26) =1434925800