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A211491 as a simple table

na(n)
128
256
3110
4206
5392
6728
71372
82562
94838
109126
1117360
1233116
1363572
14122558
15237382
16461802
17901448
181766496
193470060
206838226
2113498502
2226712038
2352921792
24105046092
25208674308
26415112766
27826217510
281646150186
293280944632

[28,56,110,206,392,728,1372,2562,4838,9126,17360,
 33116,63572,122558,237382,461802,901448,1766496,
 3470060,6838226,13498502,26712038,52921792,
 105046092,208674308,415112766,826217510,
 1646150186,3280944632]