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A074408 as a simple table

na(n)
10
21
32
44
511
632
7128
8512
91920
106963
1124576
1287380
13317755
141179648
154438966
1616777216
1763406080
18239541344
19905969664
203435973836
2113076666409
2249928994816
23191126044672
24733007751680
252815436626328
2610828603699515
2741705086880768
28160842843834660

[0,1,2,4,11,32,128,512,1920,6963,24576,87380,
 317755,1179648,4438966,16777216,63406080,
 239541344,905969664,3435973836,13076666409,
 49928994816,191126044672,733007751680,
 2815436626328,10828603699515,41705086880768,
 160842843834660]