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A146845 as a simple table

na(n)
11
21
31
41
51
61
75
813
935
1061
11141
12427
131351
144209
1519211
1675163
17402147
181986547
1912595631
2074795099
21557304499

[1,1,1,1,1,1,5,13,35,61,141,427,1351,4209,19211,
 75163,402147,1986547,12595631,74795099,557304499]