A047151 Sum{T(i,n-i): i=0,1,...,n}, array T as in A047150.

1, 2, 4, 6, 12, 24, 42, 84, 168, 336, 672, 1240, 2480, 4960, 9471, 18942, 37884, 75768, 151536, 292344, 584688, 1169376, 2287951, 4575902, 9151804, 18303608, 36607216, 71849311, 143698622, 287397244, 568041906, 1136083812, 2272167624