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A239222 as a simple table

na(n)
11
28
3216
41000
52744
68000
713824
874088
9125000
10216000
11512000
121000000
131061208
142000376
152299968
162744000
174741632
185832000
198000000
208242408
218489664
229261000
2310941048
2412812904
2513824000
2614886936
2716003008
2819683000
2934012224
3040001688
3142144192

[1,8,216,1000,2744,8000,13824,74088,125000,216000,
 512000,1000000,1061208,2000376,2299968,2744000,
 4741632,5832000,8000000,8242408,8489664,9261000,
 10941048,12812904,13824000,14886936,16003008,
 19683000,34012224,40001688,42144192]