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A317280 as a simple table

n a(n)
0 1
1 2
2 4
3 10
4 30
5 108
6 444
7 2112
8 11040
9 65712
10 414816
11 2992944
12 21876816
13 188936928
14 1527813216
15 15991733376
16 133364903040
17 1794144752640
18 13329036288000
19 270750383400960
20 1167153128110080
21 57074973648030720
22 -103080839984916480
23 17319631144046423040
24 -171982551742151685120

[1,2,4,10,30,108,444,2112,11040,65712,414816,
 2992944,21876816,188936928,1527813216,15991733376,
 133364903040,1794144752640,13329036288000,
 270750383400960,1167153128110080,
 57074973648030720,-103080839984916480,
 17319631144046423040,-171982551742151685120]

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Last modified April 19 02:28 EDT 2024. Contains 371782 sequences. (Running on oeis4.)