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A218941 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 28
5 144
6 1259
7 9560
8 123102
9 1371022
10 23449585
11 317178020
12 8296640115
13 136245390535 

[1,1,2,6,28,144,1259,9560,123102,1371022,23449585,
 317178020,8296640115,136245390535]

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Last modified May 19 04:28 EDT 2024. Contains 372666 sequences. (Running on oeis4.)