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A275448 as a simple table

na(n)
21
32
43
54
66
712
828
965
10146
11327
12749
131756
144165
159913
1623652
1756687
18136627
19330969
20804915
211963830
224805523
2311793046
2429019930
2571589861
26177006752
27438561959
281088714711
292707615555
306745272783
3116830750107
3242058592797
33105248042792

[1,2,3,4,6,12,28,65,146,327,749,1756,4165,9913,
 23652,56687,136627,330969,804915,1963830,4805523,
 11793046,29019930,71589861,177006752,438561959,
 1088714711,2707615555,6745272783,16830750107,
 42058592797,105248042792]