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A186738 as a simple table

na(n)
00
10
21
32
46
515
646
7137
8460
91557
105698
1121269
1283948
13339177
141430502
156178981
1627636512
17126500209
18596320914
192873324677
2014203422044
2171669915585
22369941778510
231946679921381

[0,0,1,2,6,15,46,137,460,1557,5698,21269,83948,
 339177,1430502,6178981,27636512,126500209,
 596320914,2873324677,14203422044,71669915585,
 369941778510,1946679921381]