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A280571 as a simple table

n a(n)
1 1
2 4
3 52
4 1228
5 42652
6 1972324
7 114581476
8 8051020348
9 666126945340
10 63620722928308
11 6907454641512244
12 842227742687112604
13 114192665828161184332
14 17076069626235659815108
15 2796969496541969481342100
16 498871283058754285439126092
17 96403472225110465517090352700
18 20094942949266343527252229063204
19 4500802213556155723422379457382916
20 1079478060677848794106956676648220860

[1,4,52,1228,42652,1972324,114581476,8051020348,
 666126945340,63620722928308,6907454641512244,
 842227742687112604,114192665828161184332,
 17076069626235659815108,2796969496541969481342100,
 498871283058754285439126092,
 96403472225110465517090352700,
 20094942949266343527252229063204,
 4500802213556155723422379457382916,
 1079478060677848794106956676648220860]

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Last modified August 30 15:55 EDT 2024. Contains 375545 sequences. (Running on oeis4.)