a(0)=2, a(n) = n^2+a(n-1).

Terms

a(0) =2a(1) =3a(2) =7a(3) =16a(4) =32a(5) =57a(6) =93a(7) =142a(8) =206a(9) =287a(10) =387a(11) =508a(12) =652a(13) =821a(14) =1017a(15) =1242a(16) =1498a(17) =1787a(18) =2111a(19) =2472a(20) =2872a(21) =3313a(22) =3797a(23) =4326a(24) =4902a(25) =5527a(26) =6203a(27) =6932a(28) =7716a(29) =8557