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A013766 as a simple table

na(n)
020
1160000
21280000000
310240000000000
481920000000000000
5655360000000000000000
65242880000000000000000000
741943040000000000000000000000
8335544320000000000000000000000000
92684354560000000000000000000000000000

[20,160000,1280000000,10240000000000,
 81920000000000000,655360000000000000000,
 5242880000000000000000000,
 41943040000000000000000000000,
 335544320000000000000000000000000,
 2684354560000000000000000000000000000]