Generalized Stirling2 array (4,2).

Terms

a(0) =1a(1) =12a(2) =8a(3) =1a(4) =360a(5) =480a(6) =180a(7) =24a(8) =1a(9) =20160a(10) =40320a(11) =25200a(12) =6720a(13) =840a(14) =48a(15) =1a(16) =1814400a(17) =4838400a(18) =4233600a(19) =1693440a(20) =352800a(21) =40320a(22) =2520a(23) =80a(24) =1a(25) =239500800a(26) =798336000a(27) =898128000a(28) =479001600a(29) =139708800