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A280480 as a simple table

na(n)
10
21
30
40
56
60
76
822
930
100
116
1263
13208
14158
150
1630
17162
18997
191939
20846
210
2254
23381
244070
2515104
2617406
274446
280
29158
30884
3115441
32100306
33214635
34149057
3522734
360
37342
381995
3955149
40618883
412272190
422886700
431224092
44113310
450
46846
474478
48189470
493589912

[0,1,0,0,6,0,6,22,30,0,6,63,208,158,0,30,162,997,
 1939,846,0,54,381,4070,15104,17406,4446,0,158,884,
 15441,100306,214635,149057,22734,0,342,1995,55149,
 618883,2272190,2886700,1224092,113310,0,846,4478,
 189470,3589912]