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A090352 as a simple table

na(n)
01
12
27
336
4255
52370
627713
7393352
86582068
9126888632
102767912036
1167362737168
121808596304964
1353083358012760
141690443996202428
1558039582729688320
162136931230333535178
1783981145793974066484

[1,2,7,36,255,2370,27713,393352,6582068,126888632,
 2767912036,67362737168,1808596304964,
 53083358012760,1690443996202428,58039582729688320,
 2136931230333535178,83981145793974066484]