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A261331 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 18
5 52
6 143
7 396
8 1083
9 2971
10 8087
11 21981
12 59533
13 160857
14 433467
15 1165542
16 3126951
17 8372451
18 22374172
19 59684669
20 158941356
21 422582925
22 1121814072
23 2973703449
24 7871754065
25 20809918535
26 54943916547
27 144891525408
28 381647503607
29 1004149670985

[1,1,2,7,18,52,143,396,1083,2971,8087,21981,59533,
 160857,433467,1165542,3126951,8372451,22374172,
 59684669,158941356,422582925,1121814072,
 2973703449,7871754065,20809918535,54943916547,
 144891525408,381647503607,1004149670985]

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Last modified April 26 19:27 EDT 2024. Contains 372004 sequences. (Running on oeis4.)