a(n) = n * (n + 4) * (n + 8).

Terms

a(0) =0a(1) =45a(2) =120a(3) =231a(4) =384a(5) =585a(6) =840a(7) =1155a(8) =1536a(9) =1989a(10) =2520a(11) =3135a(12) =3840a(13) =4641a(14) =5544a(15) =6555a(16) =7680a(17) =8925a(18) =10296a(19) =11799a(20) =13440a(21) =15225a(22) =17160a(23) =19251a(24) =21504a(25) =23925a(26) =26520a(27) =29295a(28) =32256a(29) =35409