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A273397 as a simple table

na(n)
01
11
21
35
4377
5267914296
61725375039079340637797070384
7202401005213503038261932567177107618332887918916819829782797456368284639448671475316218754

[1,1,1,5,377,267914296,
 1725375039079340637797070384,
 20240100521350303826193256717710761833288791891681\
 9829782797456368284639448671475316218754]