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A101120 as a simple table

na(n)
17
222
352
4112
5239
6494
71004
82024
94071
108166
1116356
1232736
1365503
14131038
15262108
16524248
171048535
182097110
194194260
208388560
2116777167
2233554382
2367108812
24134217672
25268435399
26536870854
271073741764
282147483584
294294967231
308589934526
3117179869116
3234359738296

[7,22,52,112,239,494,1004,2024,4071,8166,16356,
 32736,65503,131038,262108,524248,1048535,2097110,
 4194260,8388560,16777167,33554382,67108812,
 134217672,268435399,536870854,1073741764,
 2147483584,4294967231,8589934526,17179869116,
 34359738296]