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A374819 as a simple table

na(n)
01
11
21
31
44
51
61
718
818
91
101
11166
12656
13166
141
151
167579
17189967
18189967
197579
201
211
227828352

[1,1,1,1,4,1,1,18,18,1,1,166,656,166,1,1,7579,
 189967,189967,7579,1,1,7828352]