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A231684 as a simple table

na(n)
00
11
23
36
410
515
621
728
836
937
1039
1142
1246
1351
1457
1564
1672
1781
1883
1986
2090
2195
22101
23108
24116
25125
26135
27138
28142
29147
30153
31160
32168
33177
34187
35198
36202
37207
38213
39220
40228
41237
42247
43258
44270
45275
46281
47288
48296
49305
50315
51326
52338
53351
54357
55364
56372
57381
58391
59402
60414
61427
62441
63448
64456
65465
66475
67486
68498
69511
70525
71540
72548
73557
74567
75578
76590
77603
78617
79632

[0,1,3,6,10,15,21,28,36,37,39,42,46,51,57,64,72,
 81,83,86,90,95,101,108,116,125,135,138,142,147,
 153,160,168,177,187,198,202,207,213,220,228,237,
 247,258,270,275,281,288,296,305,315,326,338,351,
 357,364,372,381,391,402,414,427,441,448,456,465,
 475,486,498,511,525,540,548,557,567,578,590,603,
 617,632]