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A172317 as a simple table

na(n)
01
12
24
38
416
532
664
7128
8255
9508
101012
112016
124016
138000
1415936
1531744
1663233
17125958
18250904
19499792
20995568
211983136
223950336
237868928
2415674623
2531223288
2662195672
27123891552
28246787536
29491591936
30979233536

[1,2,4,8,16,32,64,128,255,508,1012,2016,4016,8000,
 15936,31744,63233,125958,250904,499792,995568,
 1983136,3950336,7868928,15674623,31223288,
 62195672,123891552,246787536,491591936,979233536]