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A008551 as a simple table

n a(n)
0 2
1 0
2 0
3 128
4 0
5 384
6 3648
7 1920
8 20448
9 71680
10 125952
11 537600
12 1445440
13 3756288
14 11173440
15 29955072
16 79741908
17 214759680
18 564284736
19 1466972160
20 3794966880
21 9719376896
22 24675685440
23 62292331392
24 156254486400
25 389861188608

[2,0,0,128,0,384,3648,1920,20448,71680,125952,
 537600,1445440,3756288,11173440,29955072,79741908,
 214759680,564284736,1466972160,3794966880,
 9719376896,24675685440,62292331392,156254486400,
 389861188608]

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Last modified June 29 23:00 EDT 2022. Contains 354913 sequences. (Running on oeis4.)