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A003727 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 13
5 36
6 181
7 848
8 3865
9 23824
10 140521
11 871872
12 6324517
13 44942912
14 344747677
15 2860930816
16 23853473329
17 213856723200
18 1996865965009
19 19099352929280
20 193406280000061
21 2010469524579328
22 21615227339380357
23 242177953175506944

[1,1,1,4,13,36,181,848,3865,23824,140521,871872,
 6324517,44942912,344747677,2860930816,23853473329,
 213856723200,1996865965009,19099352929280,
 193406280000061,2010469524579328,
 21615227339380357,242177953175506944]

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)