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A227934 as a simple table

n a(n)
0 1
1 1
2 2
3 18
4 219
5 4395
6 129280
7 4970984
8 257765641
9 16781325293
10 1348125117404
11 132465548869248
12 15490711962965785
13 2134540479514352751
14 343307151209151099650
15 63606662918084631874716
16 13470938654397531939066909
17 3238387688528230753569245297
18 876825599524773154743990986391

[1,1,2,18,219,4395,129280,4970984,257765641,
 16781325293,1348125117404,132465548869248,
 15490711962965785,2134540479514352751,
 343307151209151099650,63606662918084631874716,
 13470938654397531939066909,
 3238387688528230753569245297,
 876825599524773154743990986391]

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Last modified October 21 21:25 EDT 2021. Contains 348155 sequences. (Running on oeis4.)