a(n) = 97*n^2.

Terms

a(0) =0a(1) =97a(2) =388a(3) =873a(4) =1552a(5) =2425a(6) =3492a(7) =4753a(8) =6208a(9) =7857a(10) =9700a(11) =11737a(12) =13968a(13) =16393a(14) =19012a(15) =21825a(16) =24832a(17) =28033a(18) =31428a(19) =35017a(20) =38800a(21) =42777a(22) =46948a(23) =51313a(24) =55872a(25) =60625a(26) =65572a(27) =70713a(28) =76048a(29) =81577