a(n) = n*(3*n^2 - 5*n + 3).

Terms

a(0) =0a(1) =1a(2) =10a(3) =45a(4) =124a(5) =265a(6) =486a(7) =805a(8) =1240a(9) =1809a(10) =2530a(11) =3421a(12) =4500a(13) =5785a(14) =7294a(15) =9045a(16) =11056a(17) =13345a(18) =15930a(19) =18829a(20) =22060a(21) =25641a(22) =29590a(23) =33925a(24) =38664a(25) =43825a(26) =49426a(27) =55485a(28) =62020a(29) =69049