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A080952 as a simple table

n a(n)
0 3
1 21
2 112
3 504
4 2016
5 7392
6 25344
7 82368
8 256256
9 768768
10 2236416
11 6336512
12 17547264
13 47628288
14 127008768
15 333398016
16 862912512
17 2205220864
18 5571084288
19 13927710720
20 34487664640
21 84651540480
22 206108098560
23 498094571520

[3,21,112,504,2016,7392,25344,82368,256256,768768,
 2236416,6336512,17547264,47628288,127008768,
 333398016,862912512,2205220864,5571084288,
 13927710720,34487664640,84651540480,206108098560,
 498094571520]

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)