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A171740 as a simple table

na(n)
11
28
326
4624
52293
6207702
7186621
8342324801
927924649
10260311602096
111556085529
12248876637484140
13318713056300
142544221971606336
154712469842177
16530386561769238496
171939137135947326

[1,8,26,624,2293,207702,186621,342324801,27924649,
 260311602096,1556085529,248876637484140,
 318713056300,2544221971606336,4712469842177,
 530386561769238496,1939137135947326]