Diagonal sums of Riordan matrix A118384.

Terms

a(0) =1a(1) =3a(2) =14a(3) =69a(4) =355a(5) =1872a(6) =10037a(7) =54459a(8) =298138a(9) =1643565a(10) =9111191a(11) =50739120a(12) =283635481a(13) =1590648819a(14) =8945090870a(15) =50423423685a(16) =284831065723