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A147114 as a simple table

na(n)
11
21
31
41
51
65
725
881
9473
102129
1111977
1283125
13759723
148281919
15118112177
161957920765

[1,1,1,1,1,5,25,81,473,2129,11977,83125,759723,
 8281919,118112177,1957920765]