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A220439 as a simple table

na(n)
10
20
30
40
56
66
710
815
915
1021
1121
1235
1335
1435
1535
1655
1755
1877
1977
2091
2191
2291
2391
24143
25143
26143
27143
28187
29187
30221
31221
32247
33247
34253
35253
36323
37323
38323
39323
40391
41391
42437
43437
44437
45437
46493
47493
48551
49551
50589

[0,0,0,0,6,6,10,15,15,21,21,35,35,35,35,55,55,77,
 77,91,91,91,91,143,143,143,143,187,187,221,221,
 247,247,253,253,323,323,323,323,391,391,437,437,
 437,437,493,493,551,551,589]