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A000180 as a simple table

n a(n)
0 1
1 2
2 13
3 116
4 1393
5 20894
6 376093
7 7897952
8 189550849
9 5117872922
10 153536187661
11 5066694192812
12 182400990941233
13 7113638646708086
14 298772823161739613
15 13444777042278282584
16 645349298029357564033
17 32912814199497235765682

[1,2,13,116,1393,20894,376093,7897952,189550849,
 5117872922,153536187661,5066694192812,
 182400990941233,7113638646708086,
 298772823161739613,13444777042278282584,
 645349298029357564033,32912814199497235765682]

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Last modified October 17 19:36 EDT 2018. Contains 316293 sequences. (Running on oeis4.)