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A212258 as a simple table

n a(n)
2 0
3 0
4 1
5 6
6 25
7 105
8 490
9 2548
10 14698
11 93420
12 649715
13 4912776
14 40154387
15 352937312
16 3320636540
17 33305992320
18 354819046132
19 4001699525376
20 47637151241125
21 596958623741440
22 7855611484697773
23 108314507544748032
24 1561635447992241230
25 23498865431367684096

[0,0,1,6,25,105,490,2548,14698,93420,649715,
 4912776,40154387,352937312,3320636540,33305992320,
 354819046132,4001699525376,47637151241125,
 596958623741440,7855611484697773,
 108314507544748032,1561635447992241230,
 23498865431367684096]

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Last modified October 22 18:45 EDT 2021. Contains 348175 sequences. (Running on oeis4.)