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A089561 as a simple table

n a(n)
1 1
2 31
3 431
4 5431
5 75431
6 1475431
7 91475431
8 691475431
9 57691475431
10 1357691475431
11 181357691475431
12 17181357691475431
13 1617181357691475431
14 121617181357691475431
15 20121617181357691475431 

[1,31,431,5431,75431,1475431,91475431,691475431,
 57691475431,1357691475431,181357691475431,
 17181357691475431,1617181357691475431,
 121617181357691475431,20121617181357691475431]

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Last modified April 25 12:15 EDT 2024. Contains 371969 sequences. (Running on oeis4.)