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A350520 as a simple table

na(n)
01
11
23
38
414
532
660
7128
8248
9512
101008
112048
124064
138192
1416320
1532768
1665408
17131072
18261888
19524288
201048064
212097152
224193280
238388608
2416775168
2533554432
2667104768
27134217728
28268427264

[1,1,3,8,14,32,60,128,248,512,1008,2048,4064,8192,
 16320,32768,65408,131072,261888,524288,1048064,
 2097152,4193280,8388608,16775168,33554432,
 67104768,134217728,268427264]