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A015530 as a simple table

n a(n)
0 0
1 1
2 4
3 19
4 88
5 409
6 1900
7 8827
8 41008
9 190513
10 885076
11 4111843
12 19102600
13 88745929
14 412291516
15 1915403851
16 8898489952
17 41340171361
18 192056155300
19 892245135283
20 4145149007032
21 19257331433977
22 89464772757004

[0,1,4,19,88,409,1900,8827,41008,190513,885076,
 4111843,19102600,88745929,412291516,1915403851,
 8898489952,41340171361,192056155300,892245135283,
 4145149007032,19257331433977,89464772757004]

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Last modified March 19 03:33 EDT 2024. Contains 370952 sequences. (Running on oeis4.)