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A316769 as a simple table

na(n)
11
21
32
45
511
629
774
8205
9578
101683
114978
1215000
1345672
14140600
15436421
161364876
174295403
1813594685
1943238514

[1,1,2,5,11,29,74,205,578,1683,4978,15000,45672,
 140600,436421,1364876,4295403,13594685,43238514]