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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A197395 as a simple table

na(n)
11
21
317
4547
519603
61982913
7534127371
8330460207137
9459425284426157

[1,1,17,547,19603,1982913,534127371,330460207137,
 459425284426157]