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A250886 as a simple table

n a(n)
1 1
2 1
3 4
4 15
5 68
6 322
7 1608
8 8283
9 43780
10 235950
11 1291992
12 7167030
13 40192488
14 227488900
15 1297845008
16 7455558675
17 43088726148
18 250362137590
19 1461641062200
20 8569690323810
21 50438119336440
22 297896152159260
23 1765010252344560
24 10487875429825950
25 62485899131628648
26 373198022044163532

[1,1,4,15,68,322,1608,8283,43780,235950,1291992,
 7167030,40192488,227488900,1297845008,7455558675,
 43088726148,250362137590,1461641062200,
 8569690323810,50438119336440,297896152159260,
 1765010252344560,10487875429825950,
 62485899131628648,373198022044163532]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)