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A054322 as a simple table

n a(n)
0 4
1 80
2 896
3 7680
4 56320
5 372736
6 2293760
7 13369344
8 74711040
9 403701760
10 2122317824
11 10905190400
12 54962159616
13 272461987840
14 1331439861760
15 6425271074816
16 30666066493440
17 144929376436224
18 678948430151680

[4,80,896,7680,56320,372736,2293760,13369344,
 74711040,403701760,2122317824,10905190400,
 54962159616,272461987840,1331439861760,
 6425271074816,30666066493440,144929376436224,
 678948430151680]

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Last modified March 28 14:33 EDT 2024. Contains 371254 sequences. (Running on oeis4.)