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A174187 as a simple table

na(n)
01
11
21
31
415
51
61
7165
8165
91
101
113465
1238115
133465
141
151
1649665
1711472615
1811472615
1949665
201
211
22844305
232795493855
2458705370955
252795493855
26844305
271
281
2913125105
30738772785135
31222370608325635
32222370608325635
33738772785135
3413125105
351
361

[1,1,1,1,15,1,1,165,165,1,1,3465,38115,3465,1,1,
 49665,11472615,11472615,49665,1,1,844305,
 2795493855,58705370955,2795493855,844305,1,1,
 13125105,738772785135,222370608325635,
 222370608325635,738772785135,13125105,1,1]