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A146916 as a simple table

na(n)
11
21
31
43
51
65
79
825
965
10311
11777
125163
1319629
14179101
15938309
1611522939
1783049733
181385281995
1913583413581
20310426685067
214145583315227
22129859229238145

[1,1,1,3,1,5,9,25,65,311,777,5163,19629,179101,
 938309,11522939,83049733,1385281995,13583413581,
 310426685067,4145583315227,129859229238145]