a(n) = n*(n + 2)*(n + 4).

Terms

a(0) =0a(1) =15a(2) =48a(3) =105a(4) =192a(5) =315a(6) =480a(7) =693a(8) =960a(9) =1287a(10) =1680a(11) =2145a(12) =2688a(13) =3315a(14) =4032a(15) =4845a(16) =5760a(17) =6783a(18) =7920a(19) =9177a(20) =10560a(21) =12075a(22) =13728a(23) =15525a(24) =17472a(25) =19575a(26) =21840a(27) =24273a(28) =26880a(29) =29667