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A147451 as a simple table

na(n)
11
21
31
41
51
65
713
825
9101
10375
111753
129905
1361267
14438109
153882461
1641001981
17504280659

[1,1,1,1,1,5,13,25,101,375,1753,9905,61267,438109,
 3882461,41001981,504280659]