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A304200 as a simple table

na(n)
01
11
21
32
46
518
658
7186
8570
91680
104878
1114058
1240200
13114450
14325290
15923846
162624730
177465410
1821261828
1960647370
20173288724
21496014934
221422223506
234084793082
2411751102060
2533857989968
2697697014590
27282295318536
28816759712080
292366027865810
306861964439314

[1,1,1,2,6,18,58,186,570,1680,4878,14058,40200,
 114450,325290,923846,2624730,7465410,21261828,
 60647370,173288724,496014934,1422223506,
 4084793082,11751102060,33857989968,97697014590,
 282295318536,816759712080,2366027865810,
 6861964439314]