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A219948 as a simple table

n a(n)
0 1
1 0
2 6
3 0
4 92
5 0
6 2376
7 5504
8 71248
9 253952
10 2175992
11 10140032
12 72393152
13 377186688
14 2462850896
15 13696293888
16 85330361248
17 489397951936
18 2980753350440
19 17385409283712
20 104607950578584
21 615347939509760
22 3679860151206528
23 21744078445007360
24 129606354640045704

[1,0,6,0,92,0,2376,5504,71248,253952,2175992,
 10140032,72393152,377186688,2462850896,
 13696293888,85330361248,489397951936,
 2980753350440,17385409283712,104607950578584,
 615347939509760,3679860151206528,
 21744078445007360,129606354640045704]

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Last modified May 25 19:13 EDT 2019. Contains 323576 sequences. (Running on oeis4.)