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A138736 as a simple table

n a(n)
0 1
1 1
2 4
3 36
4 368
5 5200
6 90432
7 1884736
8 45817088
9 1273874688
10 39891461120
11 1389816423424
12 53334303584256
13 2235679577657344
14 101651458028158976
15 4983219643056537600
16 262026143585449607168
17 14711289584591513387008

[1,1,4,36,368,5200,90432,1884736,45817088,
 1273874688,39891461120,1389816423424,
 53334303584256,2235679577657344,
 101651458028158976,4983219643056537600,
 262026143585449607168,14711289584591513387008]

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)