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A290368 as a simple table

na(n)
11
21
31
43
56
6270
745
863
91260
1031500
113150
12155925
13103950

[1,1,1,3,6,270,45,63,1260,31500,3150,155925,
 103950]

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Last modified September 24 14:15 EDT 2024. Contains 376200 sequences. (Running on oeis4.)