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A217627 as a simple table

na(n)
11
23
36
410
515
621
728
836
945
1046
1147
1249
1352
1456
1561
1667
1774
1882
1991
2093
2195
2299
23105
24113
25123
26135
27149
28165
29183
30186
31189
32195
33204
34216
35231
36249
37270
38294
39321
40325
41329
42337
43349
44365
45385
46409
47437
48469
49505
50510
51515
52525
53540
54560
55585
56615
57650

[1,3,6,10,15,21,28,36,45,46,47,49,52,56,61,67,74,
 82,91,93,95,99,105,113,123,135,149,165,183,186,
 189,195,204,216,231,249,270,294,321,325,329,337,
 349,365,385,409,437,469,505,510,515,525,540,560,
 585,615,650]