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A123474 as a simple table

na(n)
21
30
40
50
63
70
80
910
1010
110
120
1315
14340
1515
160
170
1821
196965
206965
2121
220
230
2428
2551296
26246295
2751296
2828
290
300
3136
32326676
3314750946
3414750946
35326676
3636
370
380
3945
401917840
41322476210
42796058676
43322476210
441917840
4545
460
470
4855
4910683255

[1,0,0,0,3,0,0,10,10,0,0,15,340,15,0,0,21,6965,
 6965,21,0,0,28,51296,246295,51296,28,0,0,36,
 326676,14750946,14750946,326676,36,0,0,45,1917840,
 322476210,796058676,322476210,1917840,45,0,0,55,
 10683255]