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A186648 as a simple table

n a(n)
0 0
1 0
2 2
3 6
4 38
5 130
6 662
7 2380
8 11174
9 41226
10 185642
11 695860
12 3055670
13 11576916
14 49995220
15 190876696
16 814610854
17 3128164186
18 13233277634
19 51046844836
20 214488337418
21 830382690556
22 3470405605900
23 13475470680616
24 56073057254198
25 218269673491780

[0,0,2,6,38,130,662,2380,11174,41226,185642,
 695860,3055670,11576916,49995220,190876696,
 814610854,3128164186,13233277634,51046844836,
 214488337418,830382690556,3470405605900,
 13475470680616,56073057254198,218269673491780]

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Last modified April 24 19:39 EDT 2024. Contains 371963 sequences. (Running on oeis4.)