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A105229 as a simple table

na(n)
00
13
24
39
426
559
6112
7245
8502
91015
102036
114081
128178
1316355
1432744
1565517
16131054
17262127
18524268
191048553
202097130
214194283
228388576
2316777189
2433554406
2567108839
26134217700
27268435425
28536870850
291073741779
302147483608
314294967261
328589934558

[0,3,4,9,26,59,112,245,502,1015,2036,4081,8178,
 16355,32744,65517,131054,262127,524268,1048553,
 2097130,4194283,8388576,16777189,33554406,
 67108839,134217700,268435425,536870850,1073741779,
 2147483608,4294967261,8589934558]