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A222490 as a simple table

n a(n)
1 0
2 4
3 6
4 33
5 75
6 968
7 2408
8 31222
9 77802
10 980380
11 2576182
12 31135264
13 86474880
14 997925136
15 2901220154
16 32253476486
17 97164153940
18 1049389226220
19 3251341368326
20 34336511340904
21 108731869474946
22 1128946148580572

[0,4,6,33,75,968,2408,31222,77802,980380,2576182,
 31135264,86474880,997925136,2901220154,
 32253476486,97164153940,1049389226220,
 3251341368326,34336511340904,108731869474946,
 1128946148580572]

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Last modified January 28 15:13 EST 2022. Contains 350656 sequences. (Running on oeis4.)