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A269054 as a simple table

n a(n)
1 27
2 174
3 594
4 3078
5 13140
6 58752
7 253416
8 1090344
9 4637904
10 19604352
11 82332384
12 343986912
13 1430547456
14 5925418752
15 24456120000
16 100618925568
17 412797979584
18 1689208728576
19 6896384506176
20 28095875422848
21 114241910041536 

[27,174,594,3078,13140,58752,253416,1090344,
 4637904,19604352,82332384,343986912,1430547456,
 5925418752,24456120000,100618925568,412797979584,
 1689208728576,6896384506176,28095875422848,
 114241910041536]

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Last modified May 13 07:22 EDT 2024. Contains 372498 sequences. (Running on oeis4.)