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A155320 as a simple table

n a(n)
4 1
5 4
6 13
7 28
8 129
9 586
10 2176
11 14358
12 112046
13 791851
14 8217946
15 101868365
16 1252862099
17 20806137393 

[1,4,13,28,129,586,2176,14358,112046,791851,
 8217946,101868365,1252862099,20806137393]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)