Generalized Stirling2 array (5,2).

Terms

a(0) =1a(1) =20a(2) =10a(3) =1a(4) =1120a(5) =1040a(6) =290a(7) =30a(8) =1a(9) =123200a(10) =161920a(11) =71320a(12) =14040a(13) =1340a(14) =60a(15) =1a(16) =22422400a(17) =37452800a(18) =22097600a(19) =6263040a(20) =958720a(21) =82800a(22) =4000a(23) =100a(24) =1a(25) =6098892800a(26) =12222918400a(27) =8928102400a(28) =3257116800a(29) =675281600