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A083744 as a simple table

na(n)
11
21
34
48
58
614
721
821
930
1040
1151
1263
1376
1490
15105
16121
17138
18156
19175
20195
21216
22238
23261
24285
25310
26336
27363
28391
29420
30450
31481
32513
33546
34580
35615
36651
37688
38726
39765
40805
41846
42888
43931
44975
451020
461066
471113
481161
491210
501260
511311
521363
531416
541470

[1,1,4,8,8,14,21,21,30,40,51,63,76,90,105,121,138,
 156,175,195,216,238,261,285,310,336,363,391,420,
 450,481,513,546,580,615,651,688,726,765,805,846,
 888,931,975,1020,1066,1113,1161,1210,1260,1311,
 1363,1416,1470]