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A222468 as a simple table

n a(n)
1 1
2 2
3 8
4 36
5 196
6 1248
7 9128
8 75520
9 697936
10 7130400
11 79830272
12 972224064
13 12798573376
14 181124475392
15 2742464277632
16 44241677392896
17 757593444234496
18 13725165351006720
19 262293328557596672
20 5273316901853946880

[1,2,8,36,196,1248,9128,75520,697936,7130400,
 79830272,972224064,12798573376,181124475392,
 2742464277632,44241677392896,757593444234496,
 13725165351006720,262293328557596672,
 5273316901853946880]

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Last modified May 15 10:57 EDT 2024. Contains 372540 sequences. (Running on oeis4.)