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A177483 as a simple table

na(n)
01
11
22
36
420
585
6420
72443
816136
9120222
10993770
119042451
1289725944
13964693717
1411168801294
15138549935190
161833264311504
1725773751694161
18383664263687964
196028473673565695
2099710105438401940
211731651866118338766
2231505416776034601510
23599259743707431667279

[1,1,2,6,20,85,420,2443,16136,120222,993770,
 9042451,89725944,964693717,11168801294,
 138549935190,1833264311504,25773751694161,
 383664263687964,6028473673565695,
 99710105438401940,1731651866118338766,
 31505416776034601510,599259743707431667279]