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A279264 as a simple table

n a(n)
1 2
2 20
3 86
4 400
5 1592
6 5888
7 21882
8 79112
9 281754
10 991292
11 3452756
12 11929580
13 40936072
14 139644508
15 473965068
16 1601601800
17 5391122062
18 18084715096
19 60480149694
20 201706042464
21 671036424848
22 2227380695220
23 7378205313096

[2,20,86,400,1592,5888,21882,79112,281754,991292,
 3452756,11929580,40936072,139644508,473965068,
 1601601800,5391122062,18084715096,60480149694,
 201706042464,671036424848,2227380695220,
 7378205313096]

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Last modified June 2 00:37 EDT 2024. Contains 373032 sequences. (Running on oeis4.)