a(n) = 27225*n^2 - 39202*n + 14112.

Terms

a(0) =2135a(1) =44608a(2) =141531a(3) =292904a(4) =498727a(5) =759000a(6) =1073723a(7) =1442896a(8) =1866519a(9) =2344592a(10) =2877115a(11) =3464088a(12) =4105511a(13) =4801384a(14) =5551707a(15) =6356480a(16) =7215703a(17) =8129376a(18) =9097499a(19) =10120072a(20) =11197095a(21) =12328568a(22) =13514491a(23) =14754864a(24) =16049687a(25) =17398960a(26) =18802683a(27) =20260856a(28) =21773479