Triangle read by rows. A generalization of unsigned Lah numbers, called L[2,1].

Terms

a(0) =1a(1) =2a(2) =1a(3) =8a(4) =8a(5) =1a(6) =48a(7) =72a(8) =18a(9) =1a(10) =384a(11) =768a(12) =288a(13) =32a(14) =1a(15) =3840a(16) =9600a(17) =4800a(18) =800a(19) =50a(20) =1a(21) =46080a(22) =138240a(23) =86400a(24) =19200a(25) =1800a(26) =72a(27) =1a(28) =645120a(29) =2257920