Triangle read by rows: t(n,m) = (m+1)^n*m^(n*(n-1)/2).

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =18a(6) =1a(7) =4a(8) =48a(9) =1728a(10) =1a(11) =5a(12) =100a(13) =8000a(14) =2560000a(15) =1a(16) =6a(17) =180a(18) =27000a(19) =20250000a(20) =75937500000a(21) =1a(22) =7a(23) =294a(24) =74088a(25) =112021056a(28) =1a(29) =8a(30) =448a(31) =175616