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A172140 as a simple table

n a(n)
1 0
2 0
3 126
4 2032
5 20502
6 160696
7 929880
8 4117520
9 15037036
10 47368960
11 132577826
12 336828368
13 789558314
14 1729320120
15 3574328936
16 7027309888
17 13226773092
18 23959787480
19 41954706558
20 71276149776
21 117848892710
22 190142197976

[0,0,126,2032,20502,160696,929880,4117520,
 15037036,47368960,132577826,336828368,789558314,
 1729320120,3574328936,7027309888,13226773092,
 23959787480,41954706558,71276149776,117848892710,
 190142197976]

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Last modified January 16 23:44 EST 2019. Contains 319206 sequences. (Running on oeis4.)