a(n) = n^3 + (n+1)*(n+2).

Terms

a(0) =2a(1) =7a(2) =20a(3) =47a(4) =94a(5) =167a(6) =272a(7) =415a(8) =602a(9) =839a(10) =1132a(11) =1487a(12) =1910a(13) =2407a(14) =2984a(15) =3647a(16) =4402a(17) =5255a(18) =6212a(19) =7279a(20) =8462a(21) =9767a(22) =11200a(23) =12767a(24) =14474a(25) =16327a(26) =18332a(27) =20495a(28) =22822a(29) =25319