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A264016 as a simple table

na(n)
164
27921
31464100
4146410000
517394972100
62089022169025
7252579343635025
830557658560100100
93696969485250250000
10447272452462938576100
1154112631066129736180025
126546741114347411138472025

[64,7921,1464100,146410000,17394972100,
 2089022169025,252579343635025,30557658560100100,
 3696969485250250000,447272452462938576100,
 54112631066129736180025,6546741114347411138472025]