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A232493 as a simple table

n a(n)
0 1
1 4
2 20
3 96
4 528
5 2880
6 16704
7 96768
8 573696
9 3400704
10 20321280
11 121430016
12 727584768
13 4359536640
14 26145275904
15 156799991808
16 940656623616
17 5643079778304
18 33856758743040
19 203130232897536
20 1218760758263808
21 7312440714854400
22 43874396619669504
23 263244893701275648
24 1579466390174171136

[1,4,20,96,528,2880,16704,96768,573696,3400704,
 20321280,121430016,727584768,4359536640,
 26145275904,156799991808,940656623616,
 5643079778304,33856758743040,203130232897536,
 1218760758263808,7312440714854400,
 43874396619669504,263244893701275648,
 1579466390174171136]

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Last modified May 27 19:11 EDT 2024. Contains 372882 sequences. (Running on oeis4.)