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A056441 as a simple table

na(n)
11
21
32
45
56
629
728
8142
9242
101222
111664
1215935
1318198
14134452
15376424
161415060
172634596
1826534337
1933499358
20287001476
21727425470
223332039278
235794658930
2461120838930
2593825569002
26601444720052

[1,1,2,5,6,29,28,142,242,1222,1664,15935,18198,
 134452,376424,1415060,2634596,26534337,33499358,
 287001476,727425470,3332039278,5794658930,
 61120838930,93825569002,601444720052]