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A226883 as a simple table

n a(n)
4 24
5 60
6 300
7 1260
8 6496
9 20916
10 95640
11 353760
12 1600104
13 5626764
14 23844002
15 88442445
16 387629456
17 1389902524
18 5788974504
19 21752247660
20 93252286444
21 340374221376
22 1409907258122
23 5335751835865
24 22620834658096
25 83728749708760
26 345377277971570
27 1315699675342065

[24,60,300,1260,6496,20916,95640,353760,1600104,
 5626764,23844002,88442445,387629456,1389902524,
 5788974504,21752247660,93252286444,340374221376,
 1409907258122,5335751835865,22620834658096,
 83728749708760,345377277971570,1315699675342065]

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Last modified January 19 02:30 EST 2022. Contains 350464 sequences. (Running on oeis4.)