T(n,n-1), array T as in A047040; T(n-1,n), array T given by A047050.

Terms

a(0) =1a(1) =1a(2) =2a(3) =10a(4) =14a(5) =56a(6) =202a(7) =715a(8) =3244a(9) =12945a(10) =49742a(11) =188306a(12) =758110a(13) =2995837a(14) =11692368a(15) =45296460a(16) =178695558a(17) =703699430a(18) =2760976698a(19) =10798499630a(20) =42480767744a(21) =167242631953a(22) =657890399440