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A025707 as a simple table

na(n)
01
12
24
37
411
516
622
729
837
946
1055
1165
1276
1388
14101
15115
16130
17146
18163
19181
20199
21218
22238
23259
24281
25304
26328
27353
28379
29406
30433
31461
32490
33520
34551
35583
36616
37650
38685
39721
40757
41794
42832
43871
44911
45952
46994
471037
481081
491126
501171
511217
521264
531312
541361

[1,2,4,7,11,16,22,29,37,46,55,65,76,88,101,115,
 130,146,163,181,199,218,238,259,281,304,328,353,
 379,406,433,461,490,520,551,583,616,650,685,721,
 757,794,832,871,911,952,994,1037,1081,1126,1171,
 1217,1264,1312,1361]