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

Terms

a(0) =0a(1) =10a(2) =42a(3) =108a(4) =220a(5) =390a(6) =630a(7) =952a(8) =1368a(9) =1890a(10) =2530a(11) =3300a(12) =4212a(13) =5278a(14) =6510a(15) =7920a(16) =9520a(17) =11322a(18) =13338a(19) =15580a(20) =18060a(21) =20790a(22) =23782a(23) =27048a(24) =30600a(25) =34450a(26) =38610a(27) =43092a(28) =47908a(29) =53070