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A006416 as a simple table

na(n)
21
38
420
538
663
796
8138
9190
10253
11328
12416
13518
14635
15768
16918
171086
181273
191480
201708
211958
222231
232528
242850
253198
263573
273976
284408
294870
305363
315888
326446
337038
347665
358328
369028
379766
3810543
3911360
4012218
4113118
4214061
4315048

[1,8,20,38,63,96,138,190,253,328,416,518,635,768,
 918,1086,1273,1480,1708,1958,2231,2528,2850,3198,
 3573,3976,4408,4870,5363,5888,6446,7038,7665,8328,
 9028,9766,10543,11360,12218,13118,14061,15048]