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A185040 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 15
5 54
6 220
7 973
8 4607
9 23230
10 124088
11 698471
12 4124961
13 25474314
14 164063103
15 1099233251
16 7645091839
17 55085061358
18 410472347944
19 3158307976315
20 25057152530411
21 204717532709542
22 1720324316575275
23 14853374782672785
24 131632834029683663
25 1196258970969508760

[1,1,2,5,15,54,220,973,4607,23230,124088,698471,
 4124961,25474314,164063103,1099233251,7645091839,
 55085061358,410472347944,3158307976315,
 25057152530411,204717532709542,1720324316575275,
 14853374782672785,131632834029683663,
 1196258970969508760]

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Last modified April 21 04:56 EDT 2019. Contains 322310 sequences. (Running on oeis4.)