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A007024 as a simple table

n a(n)
4 0
5 0
6 0
7 0
8 1
9 0
10 2
11 2
12 9
13 17
14 77
15 261
16 1265
17 5852
18 29916
19 153507
20 810351 

[0,0,0,0,1,0,2,2,9,17,77,261,1265,5852,29916,
 153507,810351]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)