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A174698 as a simple table

na(n)
11
281
34409
4175720
52479881
617925691
792952858
8379978716
91286959255
103765248749
119805497200
1223226916560
1350866495373
14104288896551
15202154535834
16373400685738
17661407061211
181129334088897
191866838857216

[1,81,4409,175720,2479881,17925691,92952858,
 379978716,1286959255,3765248749,9805497200,
 23226916560,50866495373,104288896551,202154535834,
 373400685738,661407061211,1129334088897,
 1866838857216]