Triangle read by rows, T(n,k) = (2^k-1) * T(n-1,k) + T(n-1,k-1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =13a(8) =11a(9) =1a(10) =1a(11) =40a(12) =90a(13) =26a(14) =1a(15) =1a(16) =121a(17) =670a(18) =480a(19) =57a(20) =1a(21) =1a(22) =364a(23) =4811a(24) =7870a(25) =2247a(26) =120a(27) =1a(28) =1a(29) =1093