a(n) = 103680000*n^2 - 174211200*n + 73180801.

Terms

a(0) =2649601a(1) =139478401a(2) =483667201a(3) =1035216001a(4) =1794124801a(5) =2760393601a(6) =3934022401a(7) =5315011201a(8) =6903360001a(9) =8699068801a(10) =10702137601a(11) =12912566401a(12) =15330355201a(13) =17955504001a(14) =20788012801a(15) =23827881601a(16) =27075110401a(17) =30529699201