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A153945 as a simple table

n a(n)
0 1
1 2
2 4
3 15
4 38
5 116
6 499
7 3634
8 26242
9 291832
10 2965112
11 51213790
12 844607038
13 23147940890
14 598064925200
15 25057845860011
16 1027607776126888 

[1,2,4,15,38,116,499,3634,26242,291832,2965112,
 51213790,844607038,23147940890,598064925200,
 25057845860011,1027607776126888]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)