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A268906 as a simple table

n a(n)
1 0
2 240
3 1584
4 9720
5 54936
6 299088
7 1585800
8 8244288
9 42216696
10 213602256
11 1070280936
12 5319700704
13 26262038232
14 128900271600
15 629516497608
16 3061019061504
17 14827169463480
18 71576870716944
19 344483107968168

[0,240,1584,9720,54936,299088,1585800,8244288,
 42216696,213602256,1070280936,5319700704,
 26262038232,128900271600,629516497608,
 3061019061504,14827169463480,71576870716944,
 344483107968168]

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Last modified May 11 11:07 EDT 2024. Contains 372409 sequences. (Running on oeis4.)