a(n) = 46*n^2 + 1.

Terms

a(0) =1a(1) =47a(2) =185a(3) =415a(4) =737a(5) =1151a(6) =1657a(7) =2255a(8) =2945a(9) =3727a(10) =4601a(11) =5567a(12) =6625a(13) =7775a(14) =9017a(15) =10351a(16) =11777a(17) =13295a(18) =14905a(19) =16607a(20) =18401a(21) =20287a(22) =22265a(23) =24335a(24) =26497a(25) =28751a(26) =31097a(27) =33535a(28) =36065a(29) =38687