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A146186 as a simple table

na(n)
11
21
31
41
51
63
717
839
967
10157
11683
122593
1313101
1470047
15421791
162622253
1719003451
18153761107
191499143675
2015781975001
21199989123849
222755107112873

[1,1,1,1,1,3,17,39,67,157,683,2593,13101,70047,
 421791,2622253,19003451,153761107,1499143675,
 15781975001,199989123849,2755107112873]