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A135438 as a simple table

n a(n)
0 1
1 1
2 5
3 70
4 2100
5 115500
6 10510500
7 1471470000
8 300179880000
9 85551265800000
10 32937237333000000
11 16666242090498000000
12 10833057358823700000000
13 8872273976876610300000000
14 9005358086529759454500000000
15 11166644027296901723580000000000
16 16705299464836164978475680000000000
17 29818959544732554486579088800000000000

[1,1,5,70,2100,115500,10510500,1471470000,
 300179880000,85551265800000,32937237333000000,
 16666242090498000000,10833057358823700000000,
 8872273976876610300000000,
 9005358086529759454500000000,
 11166644027296901723580000000000,
 16705299464836164978475680000000000,
 29818959544732554486579088800000000000]

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Last modified October 15 18:04 EDT 2021. Contains 348033 sequences. (Running on oeis4.)