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A283353 as a simple table

na(n)
01
12
24
314
428
562
6124
7254
8508
91022
102044
114094
128188
1316382
1432764
1565534
16131068
17262142
18524284
191048574
202097148
214194302
228388604
2316777214
2433554428
2567108862
26134217724
27268435454
28536870908
291073741822
302147483644
314294967294
328589934588

[1,2,4,14,28,62,124,254,508,1022,2044,4094,8188,
 16382,32764,65534,131068,262142,524284,1048574,
 2097148,4194302,8388604,16777214,33554428,
 67108862,134217724,268435454,536870908,1073741822,
 2147483644,4294967294,8589934588]