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A167826 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 2
7 8
8 26
9 74
10 194
11 482
12 1152
13 2674
14 6068
15 13524
16 29704
17 64460
18 138482
19 294988
20 623834
21 1311086
22 2740666
23 5702270
24 11815752
25 24395678
26 50209572
27 103048168
28 210965064
29 430938832
30 878534170

[0,0,0,0,0,2,8,26,74,194,482,1152,2674,6068,13524,
 29704,64460,138482,294988,623834,1311086,2740666,
 5702270,11815752,24395678,50209572,103048168,
 210965064,430938832,878534170]

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Last modified July 24 14:48 EDT 2021. Contains 346273 sequences. (Running on oeis4.)