Generalized Stirling2 array (4,3).

Terms

a(0) =1a(1) =24a(2) =36a(3) =12a(4) =1a(5) =1440a(6) =5760a(7) =6120a(8) =2520a(9) =456a(10) =36a(11) =1a(12) =172800a(13) =1339200a(14) =2808000a(15) =2420640a(16) =1025280a(17) =232920a(18) =29400a(19) =2040a(20) =72a(21) =1a(22) =36288000a(23) =471744000a(24) =1643846400a(25) =2381702400a(26) =1745755200a(27) =721224000a(28) =178941600a(29) =27624960