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A038519 as a simple table

na(n)
01
10
21
33
42
510
616
728
872
9120
10256
11528
12992
132080
144096
158128
1616512
1732640
1865536
19131328
20261632
21524800
221048576
232096128
244196352
258386560
2616777216
2733558528
2867100672
29134225920
30268435456
31536854528
321073774592

[1,0,1,3,2,10,16,28,72,120,256,528,992,2080,4096,
 8128,16512,32640,65536,131328,261632,524800,
 1048576,2096128,4196352,8386560,16777216,33558528,
 67100672,134225920,268435456,536854528,1073774592]