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A043913 as a simple table

na(n)
121
252
370
4101
5119
6153
7168
8199
9217
10248
11266
12297
13315
14346
15370
16395
17413
18444
19462
20496
21511
22542
23560
24591
25609
26640
27658
28689
29713
30738
31756
32787
33805
34839
35854
36885
37903
38934
39952
40983
411001
421077
431081
441099
451130

[21,52,70,101,119,153,168,199,217,248,266,297,315,
 346,370,395,413,444,462,496,511,542,560,591,609,
 640,658,689,713,738,756,787,805,839,854,885,903,
 934,952,983,1001,1077,1081,1099,1130]