Triangle with subscripts (1,1),(2,1),(1,2),(3,1),(2,2),(1,3), etc. in which entry (i,j) is [ i/j ].

Terms

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