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A049428 as a simple table

n a(n)
0 1
1 1
2 6
3 36
4 246
5 2046
6 19716
7 209616
8 2441916
9 31050396
10 425883816
11 6244077456
12 97391939976
13 1609040166696
14 28029696862896
15 512903202039936
16 9829166157390096
17 196739739722616336
18 4102788435212513376
19 88945209649582514496
20 2000700796384204930656

[1,1,6,36,246,2046,19716,209616,2441916,31050396,
 425883816,6244077456,97391939976,1609040166696,
 28029696862896,512903202039936,9829166157390096,
 196739739722616336,4102788435212513376,
 88945209649582514496,2000700796384204930656]

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Last modified June 20 10:13 EDT 2021. Contains 345162 sequences. (Running on oeis4.)