Generalized Catalan triangle, based on C(2,2; n) = A064340(n).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =5a(5) =9a(6) =28a(7) =32a(8) =36a(9) =64a(10) =256a(11) =284a(12) =300a(13) =328a(14) =584a(15) =2704a(16) =2960a(17) =3072a(18) =3184a(19) =3440a(20) =6144a(21) =31168a(22) =33872a(23) =34896a(24) =35680a(25) =36704a(26) =39408a(27) =70576a(28) =380608a(29) =411776