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A131014 as a simple table

n a(n)
1 4
2 61
3 274
4 1764
5 13068
6 109584
7 1026576
8 10628640
9 120543840
10 1486442880
11 19802759040
12 283465647360
13 4339163001600
14 70734282393600
15 1223405590579200
16 22376988058521600
17 431565146817638400
18 8752948036761600000
19 186244810780170240000
20 4148476779335454720000

[4,61,274,1764,13068,109584,1026576,10628640,
 120543840,1486442880,19802759040,283465647360,
 4339163001600,70734282393600,1223405590579200,
 22376988058521600,431565146817638400,
 8752948036761600000,186244810780170240000,
 4148476779335454720000]

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Last modified September 17 17:56 EDT 2021. Contains 347489 sequences. (Running on oeis4.)