Triangle formed by Pascal's rule with borders = A000108.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =2a(6) =5a(7) =4a(8) =4a(9) =5a(10) =14a(11) =9a(12) =8a(13) =9a(14) =14a(15) =42a(16) =23a(17) =17a(18) =17a(19) =23a(20) =42a(21) =132a(22) =65a(23) =40a(24) =34a(25) =40a(26) =65a(27) =132a(28) =429a(29) =197