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A166892 as a simple table

na(n)
11
24
330
4364
56233
6139008
73833052
8126105168
94824243516
10210489178476
1110318212622770
12561491367744672
1333588989930164050
142190978413703916624
15154771816676784778818
1611771103512077651149912
17959000166676677798631894

[1,4,30,364,6233,139008,3833052,126105168,
 4824243516,210489178476,10318212622770,
 561491367744672,33588989930164050,
 2190978413703916624,154771816676784778818,
 11771103512077651149912,959000166676677798631894]