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A169972 as a simple table

n a(n)
1 1
2 1
3 4
4 121
5 44616
6 296321796
7 49349521382400
8 274297679317746753201
9 65390418299618584017607843840
10 835540973239052220092040438770571673600
11 699223737568108870926946337958273307401796122574848
12 45972626921047684591582043297155215097623586012952539543386944400
13 280557859170859578520437955471080653742986746600924845659942638564262231616000000 

[1,1,4,121,44616,296321796,49349521382400,
 274297679317746753201,
 65390418299618584017607843840,
 835540973239052220092040438770571673600,
 69922373756810887092694633795827330740179612257484\
 8,
 45972626921047684591582043297155215097623586012952\
 539543386944400,
 28055785917085957852043795547108065374298674660092\
 4845659942638564262231616000000]

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Last modified December 7 18:28 EST 2023. Contains 367660 sequences. (Running on oeis4.)