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A006759 as a simple table

na(n)
10
20
30
43
517
6131
7915
86553
947026
10341888
112505449
1218534827
13138224058
141038594326
157856087894
1659782042225
17457359506070
183515816578512
1927143401299351
20210372490707568

[0,0,0,3,17,131,915,6553,47026,341888,2505449,
 18534827,138224058,1038594326,7856087894,
 59782042225,457359506070,3515816578512,
 27143401299351,210372490707568]