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A147936 as a simple table

n a(n)
1 1
2 2
3 6
4 16
5 54
6 260
7 1236
8 6360
9 31636
10 166080
11 1095490
12 6861468
13 47125320
14 327177196
15 2371069132
16 20747895710 

[1,2,6,16,54,260,1236,6360,31636,166080,1095490,
 6861468,47125320,327177196,2371069132,20747895710]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)