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A334155 as a simple table

na(n)
01
12
25
315
457
5273
61593
710953
886553
9771993
107666713
1183871513
121001957913
1312976997913
14181106559513
152709277004313
1643247182412313
17733699248716313
1813182759232076313
19250070586344012313
204994229502288460313
21104743211837530700313
222301653725221036620313

[1,2,5,15,57,273,1593,10953,86553,771993,7666713,
 83871513,1001957913,12976997913,181106559513,
 2709277004313,43247182412313,733699248716313,
 13182759232076313,250070586344012313,
 4994229502288460313,104743211837530700313,
 2301653725221036620313]