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A146999 as a simple table

na(n)
11
21
31
41
51
61
72
83
95
107
1113
1219
1353
14121
15389
16940
173064
187695
1929728
2097515
21493327
221920641
2310778992
2446183271
25290012194
261476840183
2711445253811

[1,1,1,1,1,1,2,3,5,7,13,19,53,121,389,940,3064,
 7695,29728,97515,493327,1920641,10778992,46183271,
 290012194,1476840183,11445253811]