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A025598 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 127
8 1568
9 17221
10 157710
11 1360107
12 11104632
13 87999275
14 681209386
15 5192306420
16 39117179936
17 292250754994
18 2169869100416
19 16036792568508
20 118115950230120
21 867736883991669
22 6362604049648708
23 46586411156710601
24 340735507632772936

[0,0,0,0,0,0,0,127,1568,17221,157710,1360107,
 11104632,87999275,681209386,5192306420,
 39117179936,292250754994,2169869100416,
 16036792568508,118115950230120,867736883991669,
 6362604049648708,46586411156710601,
 340735507632772936]

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Last modified May 29 02:00 EDT 2022. Contains 354122 sequences. (Running on oeis4.)