Row sums of number triangle A154221.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =17a(5) =38a(6) =87a(7) =200a(8) =457a(9) =1034a(10) =2315a(11) =5132a(12) =11277a(13) =24590a(14) =53263a(15) =114704a(16) =245777a(17) =524306a(18) =1114131a(19) =2359316a(20) =4980757a(21) =10485782a(22) =22020119a(23) =46137368a(24) =96469017a(25) =201326618a(26) =419430427a(27) =872415260a(28) =1811939357a(29) =3758096414