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A155272
as a simple table
n
a(n)
4
1
5
7
6
19
7
52
8
260
9
1220
10
7357
11
60311
12
545790
13
5982967
14
83324072
15
1383688085
16
28070423509
17
700749741616
[1,7,19,52,260,1220,7357,60311,545790,5982967, 83324072,1383688085,28070423509,700749741616]
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Last modified August 12 19:26 EDT 2024. Contains 375113 sequences. (Running on oeis4.)