Row sums of A026584.

Terms

a(0) =1a(1) =1a(2) =4a(3) =8a(4) =23a(5) =54a(6) =143a(7) =354a(8) =914a(9) =2306a(10) =5907a(11) =15012a(12) =38368a(13) =97804a(14) =249865a(15) =637834a(16) =1629729a(17) =4163398a(18) =10640753a(19) =27196246a(20) =69526562a(21) =177757762a(22) =454541197a(23) =1162403180a(24) =2972953385a(25) =7604223184a(26) =19451741733a(27) =49761433640a(28) =127308417226