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A255508 as a simple table

na(n)
11
23
36
47
510
615
721
828
936
1037
1140
1245
1355
1466
1578
1691
17105
18120
19121
20124
21129
22136
23153
24171
25190
26210
27231
28253
29276
30300
31301
32304
33309
34316
35325
36351
37378
38406
39435
40465
41496
42528
43561
44595
45630
46631
47634
48639
49646
50655
51666
52703
53741
54780
55820
56861

[1,3,6,7,10,15,21,28,36,37,40,45,55,66,78,91,105,
 120,121,124,129,136,153,171,190,210,231,253,276,
 300,301,304,309,316,325,351,378,406,435,465,496,
 528,561,595,630,631,634,639,646,655,666,703,741,
 780,820,861]