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

Terms

a(0) =1a(1) =1a(2) =9a(3) =31a(4) =73a(5) =141a(6) =241a(7) =379a(8) =561a(9) =793a(10) =1081a(11) =1431a(12) =1849a(13) =2341a(14) =2913a(15) =3571a(16) =4321a(17) =5169a(18) =6121a(19) =7183a(20) =8361a(21) =9661a(22) =11089a(23) =12651a(24) =14353a(25) =16201a(26) =18201a(27) =20359a(28) =22681a(29) =25173