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A001693 as a simple table

n a(n)
0 1
1 7
2 21
3 112
4 588
5 3360
6 19544
7 117648
8 720300
9 4483696
10 28245840
11 179756976
12 1153430600
13 7453000800
14 48444446376
15 316504099520
16 2077057800300
17 13684147881600
18 90467419857752
19 599941851861744

[1,7,21,112,588,3360,19544,117648,720300,4483696,
 28245840,179756976,1153430600,7453000800,
 48444446376,316504099520,2077057800300,
 13684147881600,90467419857752,599941851861744]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)