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A284543 as a simple table

na(n)
01
13
27
311
423
543
671
7219
8503
91003
101991
114059
128183
1316363
1432711
1565499
16131063
17262123
18524231
191048539
202097143
214194283
228388551
2316777179
2433554423
2567108843
26134217671
27268435419
28536870903
291073741803
302147483591
314294967259
328589934583

[1,3,7,11,23,43,71,219,503,1003,1991,4059,8183,
 16363,32711,65499,131063,262123,524231,1048539,
 2097143,4194283,8388551,16777179,33554423,
 67108843,134217671,268435419,536870903,1073741803,
 2147483591,4294967259,8589934583]