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A177597 as a simple table

na(n)
11
220
31338
4209079
563406701
633142617807
727492398898930
834056987326957589
960130947572363390910
10145825864087539572389710

[1,20,1338,209079,63406701,33142617807,
 27492398898930,34056987326957589,
 60130947572363390910,145825864087539572389710]