a(n) = 62*n^2 + 1.

Terms

a(0) =1a(1) =63a(2) =249a(3) =559a(4) =993a(5) =1551a(6) =2233a(7) =3039a(8) =3969a(9) =5023a(10) =6201a(11) =7503a(12) =8929a(13) =10479a(14) =12153a(15) =13951a(16) =15873a(17) =17919a(18) =20089a(19) =22383a(20) =24801a(21) =27343a(22) =30009a(23) =32799a(24) =35713a(25) =38751a(26) =41913a(27) =45199a(28) =48609a(29) =52143