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A107874 as a simple table

n a(n)
0 1
1 4
2 15
3 84
4 715
5 8568
6 134596
7 2629575
8 61523748
9 1677106640
10 52179482355
11 1823810410032
12 70724320184700
13 3012192716517082
14 139737927523546800
15 7012067478708989884
16 378371310857796292200
17 21843987843214746108900 

[1,4,15,84,715,8568,134596,2629575,61523748,
 1677106640,52179482355,1823810410032,
 70724320184700,3012192716517082,
 139737927523546800,7012067478708989884,
 378371310857796292200,21843987843214746108900]

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Last modified April 27 09:38 EDT 2024. Contains 372017 sequences. (Running on oeis4.)