a(0) = 1; for n > 0, a(n) = 41*n^2 + 2.

Terms

a(0) =1a(1) =43a(2) =166a(3) =371a(4) =658a(5) =1027a(6) =1478a(7) =2011a(8) =2626a(9) =3323a(10) =4102a(11) =4963a(12) =5906a(13) =6931a(14) =8038a(15) =9227a(16) =10498a(17) =11851a(18) =13286a(19) =14803a(20) =16402a(21) =18083a(22) =19846a(23) =21691a(24) =23618a(25) =25627a(26) =27718a(27) =29891a(28) =32146a(29) =34483