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A084940 as a simple table

n a(n)
0 1
1 1
2 7
3 126
4 4284
5 235620
6 19085220
7 2137544640
8 316356606720
9 59791398670080
10 14050978687468800
11 4018579904616076800
12 1374354327378698265600
13 553864793933615401036800
14 259762588354865623086259200

[1,1,7,126,4284,235620,19085220,2137544640,
 316356606720,59791398670080,14050978687468800,
 4018579904616076800,1374354327378698265600,
 553864793933615401036800,
 259762588354865623086259200]

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Last modified February 16 14:47 EST 2019. Contains 320163 sequences. (Running on oeis4.)