Sum of the numbers in row n of the array at A242364.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =10a(5) =16a(6) =26a(7) =46a(8) =88a(9) =174a(10) =342a(11) =660a(12) =1258a(13) =2398a(14) =4616a(15) =8998a(16) =17710a(17) =35028a(18) =69378a(19) =137430a(20) =272344a(21) =540334a(22) =1073798a(23) =2137396a(24) =4259770a(25) =8496366a(26) =16954536a(27) =33843606a(28) =67575358a(29) =134965204