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A003760 as a simple table

n a(n)
1 2
2 40
3 240
4 1558
5 8300
6 43438
7 212700
8 1014700
9 4691580
10 21257258
11 94520524
12 414149254
13 1791339472
14 7664373014
15 32481662616
16 136520499746
17 569599125312
18 2361080470268
19 9730117780704
20 39888323454064

[2,40,240,1558,8300,43438,212700,1014700,4691580,
 21257258,94520524,414149254,1791339472,7664373014,
 32481662616,136520499746,569599125312,
 2361080470268,9730117780704,39888323454064]

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