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A087708 as a simple table

na(n)
120
220
35
420
515
610
720
840
915
101770
1190
1220
13290
1440
1525
1645
171770
1830
1990
2095
2135
22290
2365
2440
2570
26345
2745
28220
291770
3050
31145
3290
3355
3495
35165
3660
37290
3817845
3965
40520
41115
4270
43120
44345
4575
46215
47220
4880
491770
50140
5185
52145
53415
5490
55715
561215
5795
58270
59165
60100
61170

[20,20,5,20,15,10,20,40,15,1770,90,20,290,40,25,
 45,1770,30,90,95,35,290,65,40,70,345,45,220,1770,
 50,145,90,55,95,165,60,290,17845,65,520,115,70,
 120,345,75,215,220,80,1770,140,85,145,415,90,715,
 1215,95,270,165,100,170]