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A204460 as a simple table

n a(n)
0 1
1 4
2 86
3 3486
4 178870
5 10388788
6 652694106
7 43304881124
8 2990752400778
9 212997373622366
10 15542763534960598
11 1156764114321375362
12 87507330113965391948
13 6711208401368504338646
14 520758394504342278328914
15 40818243590325732399837872
16 3227693268242421225516534768

[1,4,86,3486,178870,10388788,652694106,
 43304881124,2990752400778,212997373622366,
 15542763534960598,1156764114321375362,
 87507330113965391948,6711208401368504338646,
 520758394504342278328914,
 40818243590325732399837872,
 3227693268242421225516534768]

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Last modified October 15 21:38 EDT 2021. Contains 348034 sequences. (Running on oeis4.)