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A111538 as a simple table

n a(n)
0 1
1 3
2 14
3 84
4 600
5 4908
6 44952
7 454344
8 5016768
9 60062352
10 775089312
11 10728930912
12 158638465536
13 2496437377728
14 41674737264000
15 735831528563328
16 13704461848753152
17 268562085051533568
18 5525005742876244480

[1,3,14,84,600,4908,44952,454344,5016768,60062352,
 775089312,10728930912,158638465536,2496437377728,
 41674737264000,735831528563328,13704461848753152,
 268562085051533568,5525005742876244480]

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Last modified January 23 07:19 EST 2022. Contains 350507 sequences. (Running on oeis4.)