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A147921 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 74
6 372
7 2116
8 13376
9 91944
10 651888
11 5780164
12 51776784
13 517517604
14 5477813312
15 59576133472
16 755631632616 

[1,2,6,24,74,372,2116,13376,91944,651888,5780164,
 51776784,517517604,5477813312,59576133472,
 755631632616]

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)