Array T(i,1)=i, T(1,j)=j and T(i,j)=T(i-1,j-1)*T(i,j-1) read by antidiagonals.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =2a(5) =3a(6) =4a(7) =4a(8) =6a(9) =4a(10) =5a(11) =12a(12) =12a(13) =12a(14) =5a(15) =6a(16) =48a(17) =48a(18) =72a(19) =20a(20) =6a(21) =7a(22) =240a(23) =576a(24) =864a(25) =240a(26) =30a(27) =7a(28) =8a(29) =1440