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A054922 as a simple table

n a(n)
1 2
2 0
3 0
4 10
5 164
6 2670
7 56724
8 1867860
9 104538928
10 10461483366
11 1912179618740
12 644464839239880
13 402785011941549964
14 468944407349226545614
15 1021179521951204217530900
16 4174755063830188009750183026

[2,0,0,10,164,2670,56724,1867860,104538928,
 10461483366,1912179618740,644464839239880,
 402785011941549964,468944407349226545614,
 1021179521951204217530900,
 4174755063830188009750183026]

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Last modified April 19 04:12 EDT 2024. Contains 371782 sequences. (Running on oeis4.)