Antidiagonal sums of triangle A104684.

Terms

a(0) =1a(1) =2a(2) =7a(3) =26a(4) =101a(5) =404a(6) =1645a(7) =6784a(8) =28243a(9) =118442a(10) =499601a(11) =2117366a(12) =9008969a(13) =38458644a(14) =164643197a(15) =706574780a(16) =3038800419a(17) =13093784762a(18) =56513880913a(19) =244283771986