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A298646 as a simple table

n a(n)
1 0
2 0
3 4
4 18
5 88
6 360
7 1524
8 6090
9 24784
10 98244
11 393820
12 1556324
13 6196656
14 24461424
15 97079220
16 383132250
17 1518103840
18 5992343940
19 23726184372
20 93686670220
21 370840981680
22 1464969055368
23 5798679839524
24 22917832613988
25 90725318348448
26 358737952183800

[0,0,4,18,88,360,1524,6090,24784,98244,393820,
 1556324,6196656,24461424,97079220,383132250,
 1518103840,5992343940,23726184372,93686670220,
 370840981680,1464969055368,5798679839524,
 22917832613988,90725318348448,358737952183800]

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Last modified March 28 07:20 EDT 2024. Contains 371235 sequences. (Running on oeis4.)