a(n) = 10368*n^2 + 288*n + 1.

Terms

a(0) =10657a(1) =42049a(2) =94177a(3) =167041a(4) =260641a(5) =374977a(6) =510049a(7) =665857a(8) =842401a(9) =1039681a(10) =1257697a(11) =1496449a(12) =1755937a(13) =2036161a(14) =2337121a(15) =2658817a(16) =3001249a(17) =3364417a(18) =3748321a(19) =4152961a(20) =4578337a(21) =5024449a(22) =5491297a(23) =5978881a(24) =6487201a(25) =7016257