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A089127 as a simple table

n a(n)
0 1
1 1
2 1
3 2
4 4
5 14
6 62
7 422
8 4182
9 63228
10 1469976
11 53456724
12 3070947684
13 281012112132
14 41181274957380
15 9701178631343304
16 3682464921740427408
17 2255878665570796559928
18 2232433139398395667219512

[1,1,1,2,4,14,62,422,4182,63228,1469976,53456724,
 3070947684,281012112132,41181274957380,
 9701178631343304,3682464921740427408,
 2255878665570796559928,2232433139398395667219512]

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Last modified February 29 04:25 EST 2020. Contains 332353 sequences. (Running on oeis4.)