a(n) = 44*n^2 + 1.

Terms

a(0) =1a(1) =45a(2) =177a(3) =397a(4) =705a(5) =1101a(6) =1585a(7) =2157a(8) =2817a(9) =3565a(10) =4401a(11) =5325a(12) =6337a(13) =7437a(14) =8625a(15) =9901a(16) =11265a(17) =12717a(18) =14257a(19) =15885a(20) =17601a(21) =19405a(22) =21297a(23) =23277a(24) =25345a(25) =27501a(26) =29745a(27) =32077a(28) =34497a(29) =37005