Triangle read by rows: T(n,0) = T(n,n) = 1 and for 0<k<n: T(n,k) = 2*T(n-1, k-1) + T(n-1,k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =5a(8) =7a(9) =1a(10) =1a(11) =7a(12) =17a(13) =15a(14) =1a(15) =1a(16) =9a(17) =31a(18) =49a(19) =31a(20) =1a(21) =1a(22) =11a(23) =49a(24) =111a(25) =129a(26) =63a(27) =1a(28) =1a(29) =13