Triangle of numbers [ C(n,k)/k ], k=1..n-1.

Terms

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