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A146618 as a simple table

na(n)
11
21
31
413
573
6385
74155
853517
91280671
1042489917
111853052759
12122748998951
1311481223465221

[1,1,1,13,73,385,4155,53517,1280671,42489917,
 1853052759,122748998951,11481223465221]