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A283358 as a simple table

na(n)
01
11
21
313
417
529
649
7125
8241
9509
101009
112045
124081
138189
1416369
1532765
1665521
17131069
18262129
19524285
201048561
212097149
224194289
238388605
2416777201
2533554429
2667108849
27134217725
28268435441
29536870909
301073741809
312147483645
324294967281
338589934589

[1,1,1,13,17,29,49,125,241,509,1009,2045,4081,
 8189,16369,32765,65521,131069,262129,524285,
 1048561,2097149,4194289,8388605,16777201,33554429,
 67108849,134217725,268435441,536870909,1073741809,
 2147483645,4294967281,8589934589]