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A280627 as a simple table

n a(n)
0 1
1 0
2 6
3 120
4 4284
5 382560
6 40975176
7 6524350560
8 1420005102864
9 386400824613120
10 133774424157792096
11 56530740636066364800
12 28642309445854790698944
13 17209537237868777504801280
14 12062425479867549597010598016
15 9764667204009505877211747479040
16 9042097280460821686724885486625024
17 9493787529624453974176836837131427840
18 11221110790852570214718646510965006951936
19 14830442526518302962134606954574648582420480

[1,0,6,120,4284,382560,40975176,6524350560,
 1420005102864,386400824613120,133774424157792096,
 56530740636066364800,28642309445854790698944,
 17209537237868777504801280,
 12062425479867549597010598016,
 9764667204009505877211747479040,
 9042097280460821686724885486625024,
 9493787529624453974176836837131427840,
 11221110790852570214718646510965006951936,
 14830442526518302962134606954574648582420480]

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Last modified January 18 01:05 EST 2020. Contains 330995 sequences. (Running on oeis4.)