Row sums of triangle in A059397.

Terms

a(0) =1a(1) =2a(2) =6a(3) =17a(4) =51a(5) =154a(6) =473a(7) =1464a(8) =4568a(9) =14332a(10) =45187a(11) =143024a(12) =454217a(13) =1446604a(14) =4618576a(15) =14777451a(16) =47371177a(17) =152110326a(18) =489165277a(19) =1575211177a(20) =5078690936a(21) =16392526502a(22) =52963765321a(23) =171282782902a(24) =554393341371