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

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =56a(6) =202a(7) =715a(8) =2529a(9) =9701a(10) =36797a(11) =138564a(12) =520062a(13) =1999679a(14) =7700373a(15) =29612097a(16) =113722740a(17) =440354696a(18) =1709283358a(19) =6637835682a(20) =25773923006a(21) =100398993203a(22) =391785231463