a(n) = 3600*n^2 - 1601*n + 178.

Terms

a(0) =2177a(1) =11376a(2) =27775a(3) =51374a(4) =82173a(5) =120172a(6) =165371a(7) =217770a(8) =277369a(9) =344168a(10) =418167a(11) =499366a(12) =587765a(13) =683364a(14) =786163a(15) =896162a(16) =1013361a(17) =1137760a(18) =1269359a(19) =1408158a(20) =1554157a(21) =1707356a(22) =1867755a(23) =2035354a(24) =2210153a(25) =2392152a(26) =2581351a(27) =2777750