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A073951 as a simple table

na(n)
10
21
33
46
521
681
7252
8729
92187
106642
1119845
1259049
13176904
14531441
151594323
164780782
1714344533
1843046721
19129146724
20387420489
211162261467
223486843450
2310460471301
2431381059609
2594143001680
26282429536481
27847288609443
282541864234006
297625594296341

[0,1,3,6,21,81,252,729,2187,6642,19845,59049,
 176904,531441,1594323,4780782,14344533,43046721,
 129146724,387420489,1162261467,3486843450,
 10460471301,31381059609,94143001680,282429536481,
 847288609443,2541864234006,7625594296341]