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A173010 as a simple table

na(n)
10
20
31
43
57
614
730
862
9126
10253
11509
121021
132045
144092
158188
1616380
1732764
1865531
19131067
20262139
21524283
221048570
232097146
244194298
258388602
2616777209
2733554425
2867108857
29134217721
30268435448
31536870904
321073741816
332147483640

[0,0,1,3,7,14,30,62,126,253,509,1021,2045,4092,
 8188,16380,32764,65531,131067,262139,524283,
 1048570,2097146,4194298,8388602,16777209,33554425,
 67108857,134217721,268435448,536870904,1073741816,
 2147483640]