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A074003 as a simple table

na(n)
11
20
33
49
530
681
7225
8756
92187
106561
1119602
1259049
13177633
14530712
151594323
164782969
1714351094
1843046721
19129127041
20387440172
211162261467

[1,0,3,9,30,81,225,756,2187,6561,19602,59049,
 177633,530712,1594323,4782969,14351094,43046721,
 129127041,387440172,1162261467]