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A206688 as a simple table

n a(n)
1 2
2 36
3 176
4 916
5 4704
6 24492
7 127008
8 660888
9 3436488
10 17884080
11 93059016
12 484334480
13 2520695968
14 13119605656
15 68284077520
16 355405952496
17 1849822022856
18 9628019156288
19 50112266984832
20 260826450827576
21 1357560738338768

[2,36,176,916,4704,24492,127008,660888,3436488,
 17884080,93059016,484334480,2520695968,
 13119605656,68284077520,355405952496,
 1849822022856,9628019156288,50112266984832,
 260826450827576,1357560738338768]

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)