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

Terms

a(0) =255a(1) =1022a(2) =2301a(3) =4092a(4) =6395a(5) =9210a(6) =12537a(7) =16376a(8) =20727a(9) =25590a(10) =30965a(11) =36852a(12) =43251a(13) =50162a(14) =57585a(15) =65520a(16) =73967a(17) =82926a(18) =92397a(19) =102380a(20) =112875a(21) =123882a(22) =135401a(23) =147432a(24) =159975a(25) =173030a(26) =186597a(27) =200676a(28) =215267a(29) =230370