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A147129 as a simple table

na(n)
11
21
31
41
51
61
71
87
925
1045
1179
12171
13569
141763
156023
1622593
17106741
18481403
192734225
2013695379
2186954465

[1,1,1,1,1,1,1,7,25,45,79,171,569,1763,6023,22593,
 106741,481403,2734225,13695379,86954465]