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A189800 as a simple table

n a(n)
0 0
1 1
2 6
3 44
4 312
5 2224
6 15840
7 112832
8 803712
9 5724928
10 40779264
11 290475008
12 2069084160
13 14738305024
14 104982503424
15 747801460736
16 5326668791808
17 37942424436736
18 270267896954880
19 1925146777223168
20 13713023838978048
21 97679317251653632
22 695780094221746176

[0,1,6,44,312,2224,15840,112832,803712,5724928,
 40779264,290475008,2069084160,14738305024,
 104982503424,747801460736,5326668791808,
 37942424436736,270267896954880,1925146777223168,
 13713023838978048,97679317251653632,
 695780094221746176]

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Last modified March 29 05:28 EDT 2024. Contains 371264 sequences. (Running on oeis4.)