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A123742 as a simple table

n a(n)
1 1
2 -1
3 -2
4 48
5 30240
6 -1596672000
7 -18172937502720000
8 122457316443772566896640000
9 1284319496829094129116119090331648000000
10 -55603466527142141932748234118927499493985767915520000000

[1,-1,-2,48,30240,-1596672000,-18172937502720000,
 122457316443772566896640000,
 1284319496829094129116119090331648000000,
 -5560346652714214193274823411892749949398576791552\
 0000000]

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Last modified August 13 19:30 EDT 2020. Contains 336451 sequences. (Running on oeis4.)