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A072863 as a simple table

na(n)
01
13
29
326
472
5192
6496
71248
83072
97424
1017664
1141472
1296256
13221184
14503808
151138688
162555904
175701632
1812648448
1927918336
2061341696
21134217728
22292552704
23635437056
241375731712
252969567232
266392119296
2713723762688

[1,3,9,26,72,192,496,1248,3072,7424,17664,41472,
 96256,221184,503808,1138688,2555904,5701632,
 12648448,27918336,61341696,134217728,292552704,
 635437056,1375731712,2969567232,6392119296,
 13723762688]