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A186997 as a simple table

n a(n)
0 1
1 1
2 4
3 19
4 104
5 614
6 3816
7 24595
8 162896
9 1101922
10 7580904
11 52878654
12 373100272
13 2658188524
14 19096607120
15 138182654595
16 1006202473888
17 7367648586954
18 54214472633064
19 400698865376842
20 2973344993337520
21 22142778865313364

[1,1,4,19,104,614,3816,24595,162896,1101922,
 7580904,52878654,373100272,2658188524,19096607120,
 138182654595,1006202473888,7367648586954,
 54214472633064,400698865376842,2973344993337520,
 22142778865313364]

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Last modified April 24 17:29 EDT 2024. Contains 371962 sequences. (Running on oeis4.)