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A124551 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 16
5 66
6 348
7 2321
8 19437
9 203554
10 2661035
11 43399794
12 883165898
13 22436796424
14 712153021345
15 28264751131084
16 1403965520612428
17 87352867349503436
18 6813355443494722779
19 666712967112785700169

[1,1,2,5,16,66,348,2321,19437,203554,2661035,
 43399794,883165898,22436796424,712153021345,
 28264751131084,1403965520612428,87352867349503436,
 6813355443494722779,666712967112785700169]

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Last modified March 23 04:46 EDT 2019. Contains 321422 sequences. (Running on oeis4.)