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A012134 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 13
5 84
6 469
7 4208
8 33433
9 386064
10 3984681
11 56523072
12 718210725
13 12121690944
14 183013440765
15 3589856932608
16 62801454477105
17 1406019035808000
18 27970921286867025
19 704535958463063040

[1,1,1,4,13,84,469,4208,33433,386064,3984681,
 56523072,718210725,12121690944,183013440765,
 3589856932608,62801454477105,1406019035808000,
 27970921286867025,704535958463063040]

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Last modified November 11 18:50 EST 2019. Contains 329031 sequences. (Running on oeis4.)