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A260346 as a simple table

n a(n)
0 0
1 0
2 1
3 4
4 22
5 124
6 706
7 3968
8 21880
9 118192
10 625776
11 3251744
12 16610072
13 83537520
14 414288080
15 2028760544
16 9822006896
17 47063458528
18 223408338400
19 1051514839104
20 4910856580376
21 22772597352944
22 104914684398352
23 480457417780320
24 2188115766353616
25 9914318477830304
26 44708936142838816

[0,0,1,4,22,124,706,3968,21880,118192,625776,
 3251744,16610072,83537520,414288080,2028760544,
 9822006896,47063458528,223408338400,1051514839104,
 4910856580376,22772597352944,104914684398352,
 480457417780320,2188115766353616,9914318477830304,
 44708936142838816]

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Last modified March 29 09:14 EDT 2024. Contains 371268 sequences. (Running on oeis4.)