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A056120 as a simple table

na(n)
01
11
27
327
4108
5432
61728
76912
827648
9110592
10442368
111769472
127077888
1328311552
14113246208
15452984832
161811939328
177247757312
1828991029248
19115964116992
20463856467968
211855425871872

[1,1,7,27,108,432,1728,6912,27648,110592,442368,
 1769472,7077888,28311552,113246208,452984832,
 1811939328,7247757312,28991029248,115964116992,
 463856467968,1855425871872]