a(n) = 103680000*n^2 - 161251200*n + 62697601.

Terms

a(0) =5126401a(1) =154915201a(2) =512064001a(3) =1076572801a(4) =1848441601a(5) =2827670401a(6) =4014259201a(7) =5408208001a(8) =7009516801a(9) =8818185601a(10) =10834214401a(11) =13057603201a(12) =15488352001a(13) =18126460801a(14) =20971929601a(15) =24024758401a(16) =27284947201a(17) =30752496001