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A146475 as a simple table

na(n)
11
21
31
41
51
61
79
815
935
1057
11245
12579
133057
148465
1549975
16173815
171305505
185674409
1952338659
20276967501
213125019047
2220455456921
23286529633207
242318729204115

[1,1,1,1,1,1,9,15,35,57,245,579,3057,8465,49975,
 173815,1305505,5674409,52338659,276967501,
 3125019047,20455456921,286529633207,2318729204115]