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A168084 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
110
120
131
141
152
164
178
1816
1932
2064
21128
22256
23512
241024
252048
264096
278191
2816381
2932760
3065516
31131024
32262032
33524032
341048000
352095872
364191488
378382464
3816763904
3933525760
4067047424
41134086657
42268156933
43536281106
441072496696

[0,0,0,0,0,0,0,0,0,0,0,0,1,1,2,4,8,16,32,64,128,
 256,512,1024,2048,4096,8191,16381,32760,65516,
 131024,262032,524032,1048000,2095872,4191488,
 8382464,16763904,33525760,67047424,134086657,
 268156933,536281106,1072496696]