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A137968 as a simple table

n a(n)
0 1
1 1
2 6
3 27
4 158
5 981
6 6342
7 42728
8 295008
9 2079882
10 14908740
11 108312873
12 795836544
13 5903472999
14 44151306690
15 332552305818
16 2520416719368
17 19207222744326
18 147086508325056
19 1131292622149352
20 8735383810590486

[1,1,6,27,158,981,6342,42728,295008,2079882,
 14908740,108312873,795836544,5903472999,
 44151306690,332552305818,2520416719368,
 19207222744326,147086508325056,1131292622149352,
 8735383810590486]

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)