a(n) = 54*n^2 - 26*n + 4 (n>=1).

Terms

a(0) =32a(1) =168a(2) =412a(3) =764a(4) =1224a(5) =1792a(6) =2468a(7) =3252a(8) =4144a(9) =5144a(10) =6252a(11) =7468a(12) =8792a(13) =10224a(14) =11764a(15) =13412a(16) =15168a(17) =17032a(18) =19004a(19) =21084a(20) =23272a(21) =25568a(22) =27972a(23) =30484a(24) =33104a(25) =35832a(26) =38668a(27) =41612a(28) =44664a(29) =47824