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A265429 as a simple table

na(n)
01
13
25
39
413
518
623
730
837
945
1053
1163
1273
1384
1495
15108
16121
17135
18149
19165
20181
21198
22215
23234
24253
25273
26293
27315
28337
29360
30383
31408
32433
33459
34485
35513
36541
37570
38599
39630
40661
41693
42725
43759
44793
45828
46863
47900
48937
49975
501013
511053
521093
531134

[1,3,5,9,13,18,23,30,37,45,53,63,73,84,95,108,121,
 135,149,165,181,198,215,234,253,273,293,315,337,
 360,383,408,433,459,485,513,541,570,599,630,661,
 693,725,759,793,828,863,900,937,975,1013,1053,
 1093,1134]