a(n) = 3600*n^2 - 5599*n + 2177.

Terms

a(0) =178a(1) =5379a(2) =17780a(3) =37381a(4) =64182a(5) =98183a(6) =139384a(7) =187785a(8) =243386a(9) =306187a(10) =376188a(11) =453389a(12) =537790a(13) =629391a(14) =728192a(15) =834193a(16) =947394a(17) =1067795a(18) =1195396a(19) =1330197a(20) =1472198a(21) =1621399a(22) =1777800a(23) =1941401a(24) =2112202a(25) =2290203a(26) =2475404a(27) =2667805