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A162697 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 36
5 260
6 2190
7 23562
8 294056
9 4145976
10 66518010
11 1187366510
12 23307288972
13 500683995396
14 11669239646246
15 293211947901810
16 7905976017270480
17 227653751742812912
18 6972326784534024306

[1,1,2,6,36,260,2190,23562,294056,4145976,
 66518010,1187366510,23307288972,500683995396,
 11669239646246,293211947901810,7905976017270480,
 227653751742812912,6972326784534024306]

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Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)