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A294477 as a simple table

na(n)
01
13
27
310
415
520
626
733
840
948
1056
1166
1275
1386
1496
15109
16120
17134
18146
19161
20175
21191
22206
23223
24239
25257
26275
27294
28313
29333
30353
31374
32396
33418
34441
35464
36488
37512
38537
39563
40589
41616
42643
43671
44699
45728
46758
47788
48819
49850
50882
51914
52947
53980
541014

[1,3,7,10,15,20,26,33,40,48,56,66,75,86,96,109,
 120,134,146,161,175,191,206,223,239,257,275,294,
 313,333,353,374,396,418,441,464,488,512,537,563,
 589,616,643,671,699,728,758,788,819,850,882,914,
 947,980,1014]