a(n) = 3600*n^2 - 6751*n + 3165.

Terms

a(0) =14a(1) =4063a(2) =15312a(3) =33761a(4) =59410a(5) =92259a(6) =132308a(7) =179557a(8) =234006a(9) =295655a(10) =364504a(11) =440553a(12) =523802a(13) =614251a(14) =711900a(15) =816749a(16) =928798a(17) =1048047a(18) =1174496a(19) =1308145a(20) =1448994a(21) =1597043a(22) =1752292a(23) =1914741a(24) =2084390a(25) =2261239a(26) =2445288a(27) =2636537