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A176186 as a simple table

n a(n)
6 4
7 832
8 22708
9 312956
10 2716096
11 17117832
12 84871680
13 349093856
14 1239869972
15 3905117168
16 11139611892
17 29224290600
18 71402912960
19 164029487484
20 357164398040
21 741835920276
22 1477798367368
23 2836053660668
24 5263672510684

[4,832,22708,312956,2716096,17117832,84871680,
 349093856,1239869972,3905117168,11139611892,
 29224290600,71402912960,164029487484,357164398040,
 741835920276,1477798367368,2836053660668,
 5263672510684]

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Last modified November 18 21:51 EST 2017. Contains 294912 sequences.