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A146599 as a simple table

na(n)
11
21
31
41
51
61
71
81
91
101
113
123
137
147
1519
1619
1751
1851
19237
20237
211335
221335
238829

[1,1,1,1,1,1,1,1,1,1,3,3,7,7,19,19,51,51,237,237,
 1335,1335,8829]