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A123742 as a simple table

na(n)
11
2-1
3-2
448
530240
6-1596672000
7-18172937502720000
8122457316443772566896640000
91284319496829094129116119090331648000000
10-55603466527142141932748234118927499493985767915520000000

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