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A199905 as a simple table

n a(n)
1 1
2 6
3 42
4 152
5 804
6 5016
7 24864
8 139148
9 814776
10 4509164
11 25781576
12 149525280
13 856571710
14 4954153908
15 28801991844
16 167153096856
17 973462118580
18 5682734337828
19 33191217303840
20 194193233863080
21 1137757795417530

[1,6,42,152,804,5016,24864,139148,814776,4509164,
 25781576,149525280,856571710,4954153908,
 28801991844,167153096856,973462118580,
 5682734337828,33191217303840,194193233863080,
 1137757795417530]

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Last modified April 24 14:54 EDT 2024. Contains 371960 sequences. (Running on oeis4.)