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A002728 as a simple table

n a(n)
0 1
1 4
2 22
3 190
4 3250
5 136758
6 17256831
7 7216495370
8 10271202313659
9 49856692830176512
10 826297617412284162618
11 46948445432190686211183650
12 9200267975562856184153936960940
13 6261904454889790650636380541051266410
14 14910331834338546882501064075429145637985605 

[1,4,22,190,3250,136758,17256831,7216495370,
 10271202313659,49856692830176512,
 826297617412284162618,46948445432190686211183650,
 9200267975562856184153936960940,
 6261904454889790650636380541051266410,
 14910331834338546882501064075429145637985605]

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)