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A055968 as a simple table

n a(n)
0 1
1 2
2 240
3 16934400
4 2433481408512000
5 1702585913798082900787200000
6 11371604489970305906683404111524659200000000
7 1255487625657168098911809977092685237691748290920448000000000000 

[1,2,240,16934400,2433481408512000,
 1702585913798082900787200000,
 11371604489970305906683404111524659200000000,
 12554876256571680989118099770926852376917482909204\
 48000000000000]

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Last modified April 16 11:48 EDT 2024. Contains 371711 sequences. (Running on oeis4.)