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A056008 as a simple table

na(n)
03
12
25
31
49
54
617
716
833
917
1065
1168
12129
1389
14257
15356
16513
17697
181025
191337
202049
212449
224097
234001
248193
254417
2616385
2717668
2832769
2924329
3065537
314633
32131073
3318532
34262145
3574128
36524289
37296512
381048577
391186048
402097153
411778369

[3,2,5,1,9,4,17,16,33,17,65,68,129,89,257,356,513,
 697,1025,1337,2049,2449,4097,4001,8193,4417,16385,
 17668,32769,24329,65537,4633,131073,18532,262145,
 74128,524289,296512,1048577,1186048,2097153,
 1778369]