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A222399 as a simple table

n a(n)
1 4
2 0
3 0
4 717
5 4644
6 89582
7 540642
8 19598014
9 141703290
10 4688775266
11 35396592602
12 1198472335971
13 9116130780608
14 303814938865968
15 2350784445147968
16 77397700040153293
17 607566776545412778
18 19739198008443582466

[4,0,0,717,4644,89582,540642,19598014,141703290,
 4688775266,35396592602,1198472335971,
 9116130780608,303814938865968,2350784445147968,
 77397700040153293,607566776545412778,
 19739198008443582466]

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Last modified October 21 02:29 EDT 2021. Contains 348141 sequences. (Running on oeis4.)