a(n) = 144*n^2 - 24*n (n>=1).

Terms

a(0) =120a(1) =528a(2) =1224a(3) =2208a(4) =3480a(5) =5040a(6) =6888a(7) =9024a(8) =11448a(9) =14160a(10) =17160a(11) =20448a(12) =24024a(13) =27888a(14) =32040a(15) =36480a(16) =41208a(17) =46224a(18) =51528a(19) =57120a(20) =63000a(21) =69168a(22) =75624a(23) =82368a(24) =89400a(25) =96720a(26) =104328a(27) =112224a(28) =120408a(29) =128880