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A153687
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
23
9
56
10
77
11
103
12
320
13
1477
14
1821
15
2992
16
15290
17
180168
18
410498
19
548816
20
672732
21
2601223
[1,2,3,4,5,6,7,23,56,77,103,320,1477,1821,2992, 15290,180168,410498,548816,672732,2601223]
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Last modified April 19 14:50 EDT 2024. Contains 371792 sequences. (Running on oeis4.)