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A278771 as a simple table

n a(n)
1 0
2 2
3 266
4 19750
5 1673658
6 251740932
7 90752836672
8 93037538287080
9 293564184229043556
10 2953569640505846392444

[0,2,266,19750,1673658,251740932,90752836672,
 93037538287080,293564184229043556,
 2953569640505846392444]

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Last modified April 24 12:01 EDT 2019. Contains 322429 sequences. (Running on oeis4.)