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A053513 as a simple table

n a(n)
1 3
2 18
3 165
4 3132
5 137268
6 15548004
7 4679446950
8 3771927027864
9 8186669639820081
10 48184182482857319682
11 774912347548961791914585
12 34299111628183837790980740312
13 4205499936656520106909422649497294 

[3,18,165,3132,137268,15548004,4679446950,
 3771927027864,8186669639820081,
 48184182482857319682,774912347548961791914585,
 34299111628183837790980740312,
 4205499936656520106909422649497294]

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Last modified April 25 01:06 EDT 2024. Contains 371964 sequences. (Running on oeis4.)