A368721 - OEIS

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A368721 as a simple table

n	a(n)
0	1
1	3
2	940896
3	18425962131085183248
4	652934720004728520613911984092239003385856
5	433324200327440062759688153700055880769227264159137063987248492437306880000

[1,3,940896,18425962131085183248, 652934720004728520613911984092239003385856, 43332420032744006275968815370005588076922726415913\ 7063987248492437306880000]