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A197657 as a simple table

n a(n)
0 1
1 4
2 22
3 134
4 866
5 5812
6 40048
7 281374
8 2006698
9 14482064
10 105527060
11 775113440
12 5731756720
13 42628923040
14 318621793472
15 2391808860446
16 18023208400634
17 136271601087352
18 1033449449559724
19 7858699302115444
20 59906766929537116
21 457685157123172664

[1,4,22,134,866,5812,40048,281374,2006698,
 14482064,105527060,775113440,5731756720,
 42628923040,318621793472,2391808860446,
 18023208400634,136271601087352,1033449449559724,
 7858699302115444,59906766929537116,
 457685157123172664]

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Last modified April 24 11:01 EDT 2024. Contains 371936 sequences. (Running on oeis4.)