a(n) = 10368*n^2 - 15840*n + 6049.

Terms

a(0) =577a(1) =15841a(2) =51841a(3) =108577a(4) =186049a(5) =284257a(6) =403201a(7) =542881a(8) =703297a(9) =884449a(10) =1086337a(11) =1308961a(12) =1552321a(13) =1816417a(14) =2101249a(15) =2406817a(16) =2733121a(17) =3080161a(18) =3447937a(19) =3836449a(20) =4245697a(21) =4675681a(22) =5126401a(23) =5597857a(24) =6090049a(25) =6602977