Square array read by downward antidiagonals: super Patalan numbers of order 5.

Terms

a(0) =1a(1) =5a(2) =20a(3) =75a(4) =50a(5) =450a(6) =1375a(7) =500a(8) =750a(9) =10500a(10) =27500a(11) =6875a(12) =5625a(13) =13125a(14) =249375a(15) =577500a(16) =110000a(17) =61875a(18) =78750a(19) =249375a(20) =5985000a(21) =12512500a(22) =1925000a(23) =825000a(24) =721875a(25) =1246875a(26) =4987500a(27) =144637500a(28) =277062500a(29) =35750000