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A146395 as a simple table

na(n)
11
21
31
41
51
61
75
819
943
10103
11349
121189
134335
1418031
1597075
16543815
173556863
1824384071
19196142765
201671349393

[1,1,1,1,1,1,5,19,43,103,349,1189,4335,18031,
 97075,543815,3556863,24384071,196142765,
 1671349393]