Row sums of triangle A131429.

Terms

a(0) =1a(1) =2a(2) =7a(3) =25a(4) =88a(5) =311a(6) =1114a(7) =4050a(8) =14917a(9) =55528a(10) =208459a(11) =787920a(12) =2994655a(13) =11433998a(14) =43824437a(15) =168520201a(16) =649840740a(17) =2512011359a(18) =9731179138a(19) =37768570827a(20) =146833956266a(21) =571711568905