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A221411 as a simple table

n a(n)
0 1
1 1
2 4
3 27
4 325
5 5553
6 140103
7 4993445
8 253780210
9 18321882898
10 1882677322704
11 275715048156637
12 57570654555092091
13 17152947168669102772
14 7295365645092117304955
15 4430848642167010373612127
16 3844378527942068170940925685
17 4766454891141869269974497298382

[1,1,4,27,325,5553,140103,4993445,253780210,
 18321882898,1882677322704,275715048156637,
 57570654555092091,17152947168669102772,
 7295365645092117304955,4430848642167010373612127,
 3844378527942068170940925685,
 4766454891141869269974497298382]

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Last modified May 9 13:27 EDT 2024. Contains 372350 sequences. (Running on oeis4.)