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A121133 as a simple table

na(n)
11
21
32
43
58
616
738
880
9180
10384
11840
121792
133856
148192
1517440
1636864
1777888
18163840
19344192
20720896
211507584
223145728
236554112
2413631488
2528312576
2658720256
27121636864
28251658240
29520097792
301073741824
312214600704
324563402752
339395257344
3419327352832

[1,1,2,3,8,16,38,80,180,384,840,1792,3856,8192,
 17440,36864,77888,163840,344192,720896,1507584,
 3145728,6554112,13631488,28312576,58720256,
 121636864,251658240,520097792,1073741824,
 2214600704,4563402752,9395257344,19327352832]