a(n) = 256*n^2 - 2*n.

Terms

a(0) =254a(1) =1020a(2) =2298a(3) =4088a(4) =6390a(5) =9204a(6) =12530a(7) =16368a(8) =20718a(9) =25580a(10) =30954a(11) =36840a(12) =43238a(13) =50148a(14) =57570a(15) =65504a(16) =73950a(17) =82908a(18) =92378a(19) =102360a(20) =112854a(21) =123860a(22) =135378a(23) =147408a(24) =159950a(25) =173004a(26) =186570a(27) =200648a(28) =215238a(29) =230340