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A168082 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
111
121
132
144
158
1616
1732
1864
19128
20256
21512
221024
232047
244093
258184
2616364
2732720
2865424
29130816
30261568
31523008
321045760
332091008
344180992
358359937
3616715781
3733423378
3866830392
39133628064
40267190704
41534250592
421068239616

[0,0,0,0,0,0,0,0,0,0,1,1,2,4,8,16,32,64,128,256,
 512,1024,2047,4093,8184,16364,32720,65424,130816,
 261568,523008,1045760,2091008,4180992,8359937,
 16715781,33423378,66830392,133628064,267190704,
 534250592,1068239616]