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A077270
as a simple table
n
a(n)
0
1
1
4
2
11
3
26
4
52
5
109
6
237
7
556
8
1405
9
3690
10
10085
11
28157
12
80071
13
230568
14
670122
[1,4,11,26,52,109,237,556,1405,3690,10085,28157, 80071,230568,670122]
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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)