a(n) = 7*n^2 + 1.

Terms

a(0) =1a(1) =8a(2) =29a(3) =64a(4) =113a(5) =176a(6) =253a(7) =344a(8) =449a(9) =568a(10) =701a(11) =848a(12) =1009a(13) =1184a(14) =1373a(15) =1576a(16) =1793a(17) =2024a(18) =2269a(19) =2528a(20) =2801a(21) =3088a(22) =3389a(23) =3704a(24) =4033a(25) =4376a(26) =4733a(27) =5104a(28) =5489a(29) =5888