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A027385 as a simple table

n a(n)
1 1
2 2
3 4
4 8
5 22
6 48
7 156
8 320
9 1008
10 2640
11 7700
12 13824
13 61320
14 170352
15 401280
16 983040
17 3796100
18 7838208
19 30566592
20 62304000
21 229686912
22 670824000
23 2003046356
24 3583180800
25 15403487000
26 48881851200
27 128672022528
28 314657860608
29 1163185915872
30 2340264960000
31 9947788640064

[1,2,4,8,22,48,156,320,1008,2640,7700,13824,61320,
 170352,401280,983040,3796100,7838208,30566592,
 62304000,229686912,670824000,2003046356,
 3583180800,15403487000,48881851200,128672022528,
 314657860608,1163185915872,2340264960000,
 9947788640064]

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)