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A120813 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 12
7 352
8 5392
9 59670
10 541044
11 4285127
12 30772896
13 205200710
14 1291195620
15 7754735430
16 44827592160
17 251003101440
18 1368033658992
19 7285815623268
20 38033923266368
21 195107105534280
22 985573624414808
23 4911044001390648

[0,0,0,0,0,12,352,5392,59670,541044,4285127,
 30772896,205200710,1291195620,7754735430,
 44827592160,251003101440,1368033658992,
 7285815623268,38033923266368,195107105534280,
 985573624414808,4911044001390648]

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Last modified August 7 23:50 EDT 2022. Contains 355995 sequences. (Running on oeis4.)