a(n) = 13122*n^2 - 324*n + 1.

Terms

a(0) =12799a(1) =51841a(2) =117127a(3) =208657a(4) =326431a(5) =470449a(6) =640711a(7) =837217a(8) =1059967a(9) =1308961a(10) =1584199a(11) =1885681a(12) =2213407a(13) =2567377a(14) =2947591a(15) =3354049a(16) =3786751a(17) =4245697a(18) =4730887a(19) =5242321a(20) =5779999a(21) =6343921a(22) =6934087a(23) =7550497a(24) =8193151a(25) =8862049