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A301818 as a simple table

n a(n)
1 0
2 2
3 4
4 68
5 1197
6 31061
7 2341241
8 221373169
9 47059520355
10 17662862033686
11 11449618914826511
12 15088557751754929900
13 33289512591289837483184
14 143748055903459113756507351
15 1108648718940092116466729395935 

[0,2,4,68,1197,31061,2341241,221373169,
 47059520355,17662862033686,11449618914826511,
 15088557751754929900,33289512591289837483184,
 143748055903459113756507351,
 1108648718940092116466729395935]

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Last modified April 24 09:42 EDT 2024. Contains 371935 sequences. (Running on oeis4.)