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A126276 as a simple table

n a(n)
2 18
3 504
4 5200
5 31500
6 136710
7 471968
8 1378944
9 3547800
10 8258250
11 17728920
12 35603568
13 67606084
14 122399550
15 212688000
16 356602880
17 579419568
18 915652674
19 1411582200
20 2128266000
21 3145097340
22 4563969718
23 6514114464
24 9157680000
25 12696125000
26 17377501050

[18,504,5200,31500,136710,471968,1378944,3547800,
 8258250,17728920,35603568,67606084,122399550,
 212688000,356602880,579419568,915652674,
 1411582200,2128266000,3145097340,4563969718,
 6514114464,9157680000,12696125000,17377501050]

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Last modified April 16 12:52 EDT 2024. Contains 371711 sequences. (Running on oeis4.)