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A201620 as a simple table

n a(n)
1 4
2 56
3 378
4 3699
5 31802
6 256836
7 1877283
8 12466658
9 75830797
10 426330762
11 2234037739
12 10991599638
13 51096736814
14 225648517165
15 951032245643
16 3840801817887
17 14914920467311
18 55860582248737
19 202312954584987

[4,56,378,3699,31802,256836,1877283,12466658,
 75830797,426330762,2234037739,10991599638,
 51096736814,225648517165,951032245643,
 3840801817887,14914920467311,55860582248737,
 202312954584987]

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Last modified April 24 11:49 EDT 2024. Contains 371936 sequences. (Running on oeis4.)