a(n) = 288*n^2 - 96*n (n>=1).

Terms

a(0) =192a(1) =960a(2) =2304a(3) =4224a(4) =6720a(5) =9792a(6) =13440a(7) =17664a(8) =22464a(9) =27840a(10) =33792a(11) =40320a(12) =47424a(13) =55104a(14) =63360a(15) =72192a(16) =81600a(17) =91584a(18) =102144a(19) =113280a(20) =124992a(21) =137280a(22) =150144a(23) =163584a(24) =177600a(25) =192192a(26) =207360a(27) =223104a(28) =239424a(29) =256320