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A025200 as a simple table

na(n)
20
32
45
511
618
728
842
960
1082
11107
12140
13176
14218
15267
16324
17389
18455
19538
20622
21726
22830
23945
241072
251211
261363
271513
281692
291868
302076
312282
322502
332759
343013
353283
363572
373854
384178
394523
404860
415244
425621
436048
446467
456907
467370
477890
488400
498896
509454
5110037
5210647
5311241
5411903
5512594
5613268
5713968

[0,2,5,11,18,28,42,60,82,107,140,176,218,267,324,
 389,455,538,622,726,830,945,1072,1211,1363,1513,
 1692,1868,2076,2282,2502,2759,3013,3283,3572,3854,
 4178,4523,4860,5244,5621,6048,6467,6907,7370,7890,
 8400,8896,9454,10037,10647,11241,11903,12594,
 13268,13968]