A triangle (lower triangular matrix) composed of Pfaff-Fuss (or Raney) sequences.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =5a(7) =3a(8) =1a(9) =1a(10) =14a(11) =12a(12) =4a(13) =1a(14) =1a(15) =42a(16) =55a(17) =22a(18) =5a(19) =1a(20) =1a(21) =132a(22) =273a(23) =140a(24) =35a(25) =6a(26) =1a(27) =1a(28) =429a(29) =1428