Triangle T(n,m) = sum_{k=m..n} A001263(k,m).

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =4a(5) =1a(6) =4a(7) =10a(8) =7a(9) =1a(10) =5a(11) =20a(12) =27a(13) =11a(14) =1a(15) =6a(16) =35a(17) =77a(18) =61a(19) =16a(20) =1a(21) =7a(22) =56a(23) =182a(24) =236a(25) =121a(26) =22a(27) =1a(28) =8a(29) =84