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A055908 as a simple table

na(n)
21
34
410
521
639
767
8107
9163
10238
11337
12463
13622
14818
151058
161346
171690
182095
192570
203120
213755
224481
235309
246245
257301
268484
279807
2811277
2912908
3014708
3116692
3218868
3321252
3423853
3526688
3629766
3733105
3836715
3940615
4044815
4149335
4254186

[1,4,10,21,39,67,107,163,238,337,463,622,818,1058,
 1346,1690,2095,2570,3120,3755,4481,5309,6245,7301,
 8484,9807,11277,12908,14708,16692,18868,21252,
 23853,26688,29766,33105,36715,40615,44815,49335,
 54186]