T(n,2), array T as in A054098.

Terms

a(0) =2a(1) =3a(2) =8a(3) =30a(4) =134a(5) =714a(6) =4462a(7) =32126a(8) =262362a(9) =2398738a(10) =24287222a(11) =269858022a(12) =3265282066a(13) =42745510682a(14) =601999275438