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A233450 as a simple table

na(n)
10
21
36
415
564
6153
7638
81519
96320
1015041
1162566
12148895
13619344
141473913
156130878
1614590239
1760689440
18144428481
19600763526
201429694575
215946945824
2214152517273
2358868694718
24140095478159
25582740001360
261386802264321
275768531318886
2813727927165055

[0,1,6,15,64,153,638,1519,6320,15041,62566,148895,
 619344,1473913,6130878,14590239,60689440,
 144428481,600763526,1429694575,5946945824,
 14152517273,58868694718,140095478159,582740001360,
 1386802264321,5768531318886,13727927165055]