a(0) = 1, a(n) = 26*n^2 + 2 for n>0.

Terms

a(0) =1a(1) =28a(2) =106a(3) =236a(4) =418a(5) =652a(6) =938a(7) =1276a(8) =1666a(9) =2108a(10) =2602a(11) =3148a(12) =3746a(13) =4396a(14) =5098a(15) =5852a(16) =6658a(17) =7516a(18) =8426a(19) =9388a(20) =10402a(21) =11468a(22) =12586a(23) =13756a(24) =14978a(25) =16252a(26) =17578a(27) =18956a(28) =20386a(29) =21868