Array A(x,y) giving the position of the y-th x in A007001 listed by rising antidiagonals.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =4a(5) =6a(6) =14a(7) =10a(8) =7a(9) =8a(10) =42a(11) =28a(12) =13a(13) =9a(14) =11a(15) =132a(16) =84a(17) =37a(18) =19a(19) =12a(20) =15a(21) =429a(22) =264a(23) =112a(24) =41a(25) =24a(26) =16a(27) =17a(28) =1430a(29) =858