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A146021 as a simple table

na(n)
11
21
31
41
51
63
717
833
977
10271
11971
123963
1320443
1499229
15615963
164003277
1733415251
18283218519
193003051651
2032410844251
21438884364075

[1,1,1,1,1,3,17,33,77,271,971,3963,20443,99229,
 615963,4003277,33415251,283218519,3003051651,
 32410844251,438884364075]