Triangle T(n,k) with the coefficient [x^k] of 1/(1-2*x-x^2+x^3)^(n-k+1) in row n, column k.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =5a(6) =1a(7) =6a(8) =14a(9) =11a(10) =1a(11) =8a(12) =27a(13) =42a(14) =25a(15) =1a(16) =10a(17) =44a(18) =101a(19) =119a(20) =56a(21) =1a(22) =12a(23) =65a(24) =196a(25) =342a(26) =322a(27) =126a(28) =1a(29) =14