a(n) = n^2*(n-1)*(n-2).

Terms

a(0) =0a(1) =18a(2) =96a(3) =300a(4) =720a(5) =1470a(6) =2688a(7) =4536a(8) =7200a(9) =10890a(10) =15840a(11) =22308a(12) =30576a(13) =40950a(14) =53760a(15) =69360a(16) =88128a(17) =110466a(18) =136800a(19) =167580a(20) =203280a(21) =244398a(22) =291456a(23) =345000a(24) =405600a(25) =473850a(26) =550368a(27) =635796a(28) =730800a(29) =836070