a(n) = 73*n^2.

Terms

a(0) =0a(1) =73a(2) =292a(3) =657a(4) =1168a(5) =1825a(6) =2628a(7) =3577a(8) =4672a(9) =5913a(10) =7300a(11) =8833a(12) =10512a(13) =12337a(14) =14308a(15) =16425a(16) =18688a(17) =21097a(18) =23652a(19) =26353a(20) =29200a(21) =32193a(22) =35332a(23) =38617a(24) =42048a(25) =45625a(26) =49348a(27) =53217a(28) =57232a(29) =61393