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A143981 as a simple table

na(n)
11
23
36
49
515
619
726
836
946
1059
1180
12100
13128
14167
15211
16267
17341
18429
19541
20682
21850
221063
231327
241647
252035
262520
273100
283810
294669
305708
316955
328468
3310267
3412441
3515026
3618120
3721788
3826175
3931355
4037510
4144769
4253362
4363460
4475384
4589348

[1,3,6,9,15,19,26,36,46,59,80,100,128,167,211,267,
 341,429,541,682,850,1063,1327,1647,2035,2520,3100,
 3810,4669,5708,6955,8468,10267,12441,15026,18120,
 21788,26175,31355,37510,44769,53362,63460,75384,
 89348]