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A116688 as a simple table

na(n)
10
20
31
43
59
617
736
861
9106
10171
11273
12411
13627
14916
151326
161890
172667
183698
195102
206943
219388
2212588
2316747
2422113
2529051
2637914
2749191
2863515
2981589
30104315
31132799
32168351
33212540
34267395
35335085
36418574
37521093
38646763
39800164
40987315

[0,0,1,3,9,17,36,61,106,171,273,411,627,916,1326,
 1890,2667,3698,5102,6943,9388,12588,16747,22113,
 29051,37914,49191,63515,81589,104315,132799,
 168351,212540,267395,335085,418574,521093,646763,
 800164,987315]