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A238641 as a simple table

na(n)
10
20
31
44
59
621
737
869
9113
10187
11286
12449
13657
14976
151397
162003
172788
183902
195323
207284
219789
2213144
2317405
2423052
2530142
2639379
2750967
2865842
2984368
30107954
31137126
32173893

[0,0,1,4,9,21,37,69,113,187,286,449,657,976,1397,
 2003,2788,3902,5323,7284,9789,13144,17405,23052,
 30142,39379,50967,65842,84368,107954,137126,
 173893]