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A203311 as a simple table

n a(n)
0 1
1 1
2 1
3 2
4 48
5 30240
6 1596672000
7 18172937502720000
8 122457316443772566896640000
9 1284319496829094129116119090331648000000
10 55603466527142141932748234118927499493985767915520000000
11 26110840958525805673462196263372614726154694067746586937781385166848000000000 

[1,1,1,2,48,30240,1596672000,18172937502720000,
 122457316443772566896640000,
 1284319496829094129116119090331648000000,
 55603466527142141932748234118927499493985767915520\
 000000,
 26110840958525805673462196263372614726154694067746\
 586937781385166848000000000]

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Last modified April 25 11:06 EDT 2024. Contains 371967 sequences. (Running on oeis4.)