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A086581 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 13
5 35
6 97
7 275
8 794
9 2327
10 6905
11 20705
12 62642
13 190987
14 586219
15 1810011
16 5617914
17 17518463
18 54857506
19 172431935
20 543861219
21 1720737981
22 5459867166
23 17369553427
24 55391735455
25 177040109419
26 567019562429
27 1819536774089

[1,1,2,5,13,35,97,275,794,2327,6905,20705,62642,
 190987,586219,1810011,5617914,17518463,54857506,
 172431935,543861219,1720737981,5459867166,
 17369553427,55391735455,177040109419,567019562429,
 1819536774089]

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Last modified April 18 14:39 EDT 2019. Contains 322209 sequences. (Running on oeis4.)