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A033452 as a simple table

n a(n)
0 0
1 1
2 5
3 22
4 99
5 471
6 2386
7 12867
8 73681
9 446620
10 2856457
11 19217243
12 135610448
13 1001159901
14 7714225057
15 61904585510
16 516347066551
17 4468588592739
18 40058673825258
19 371421499686007
20 3556976106133821

[0,1,5,22,99,471,2386,12867,73681,446620,2856457,
 19217243,135610448,1001159901,7714225057,
 61904585510,516347066551,4468588592739,
 40058673825258,371421499686007,3556976106133821]

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Last modified February 19 00:35 EST 2020. Contains 332028 sequences. (Running on oeis4.)