Row sums of A051599.

Terms

a(0) =2a(1) =6a(2) =16a(3) =36a(4) =80a(5) =164a(6) =336a(7) =676a(8) =1360a(9) =2732a(10) =5468a(11) =10948a(12) =21904a(13) =43812a(14) =87632a(15) =175276a(16) =350564a(17) =701132a(18) =1402276a(19) =2804560a(20) =5609124a(21) =11218260a(22) =22436528a(23) =44873068a(24) =89746152a(25) =179492312a(26) =358984628a(27) =717969264a(28) =1435938532a(29) =2871877072