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A318001 as a simple table

n a(n)
1 1
2 2
3 6
4 56
5 600
6 8432
7 144816
8 2892416
9 66721920
10 1732489472
11 50144683776
12 1604936139776
13 56236356234240
14 2137961925773312
15 87642967518836736
16 3863105286629851136
17 182345733925971394560
18 9130908475775186173952
19 481864839159167717277696
20 27108466364634568866922496
21 1642481780780610712999034880

[1,2,6,56,600,8432,144816,2892416,66721920,
 1732489472,50144683776,1604936139776,
 56236356234240,2137961925773312,87642967518836736,
 3863105286629851136,182345733925971394560,
 9130908475775186173952,481864839159167717277696,
 27108466364634568866922496,
 1642481780780610712999034880]

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Last modified August 10 22:36 EDT 2022. Contains 356046 sequences. (Running on oeis4.)