Row sums of triangle A091700.

Terms

a(0) =1a(1) =3a(2) =14a(3) =63a(4) =287a(5) =1306a(6) =5945a(7) =27061a(8) =123180a(9) =560707a(10) =2552301a(11) =11617904a(12) =52883925a(13) =240724103a(14) =1095760078a(15) =4987826867a(16) =22704255571a(17) =103348258626a(18) =470434387405